Intel Dh55Hc Users Manual Intel® Desktop Board Product Guide

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Intel® Desktop Board DH55HC
Product Guide
Order Number: E78886-001

Revision History
Revision
-001

Revision History
First release of the Intel® Desktop Board DH55HC Product Guide

Date
October 2009

If an FCC declaration of conformity marking is present on the board, the following statement applies:

FCC Declaration of Conformity
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
For questions related to the EMC performance of this product, contact:
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124
1-800-628-8686
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and the receiver.
•
Connect the equipment to an outlet on a circuit other than the one to which the receiver is connected.
•
Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the
user’s authority to operate the equipment.
Tested to comply with FCC standards for home or office use.

Canadian Department of Communications Compliance Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set
out in the Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numerique német pas de bruits radioélectriques dépassant les limites applicables aux
appareils numériques de la classe B prescrites dans le Réglement sur le broullage radioélectrique édicté par
le ministére des Communications du Canada.

Disclaimer
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE,
EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS
GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR
SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR
IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR
WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT
OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. Intel products are not intended
for use in medical, life saving, or life sustaining applications. Intel may make changes to specifications and
product descriptions at any time, without notice.
Intel Desktop Board DH55HC may contain design defects or errors known as errata which may cause the
product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing
your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel
literature, may be obtained from Intel Corporation by going to the World Wide Web site at:
http://www.intel.com/ or by calling 1-800-548-4725.
Intel is a trademark of Intel Corporation in the United States and other countries.
* Other names and brands may be claimed as the property of others.
Copyright © 2009, Intel Corporation. All rights reserved.

Preface
This Product Guide gives information about board layout, component installation, BIOS
update, and regulatory requirements for Intel® Desktop Board DH55HC.

Intended Audience
The Product Guide is intended for technically qualified personnel. It is not intended for
general audiences.

Use Only for Intended Applications
All Intel Desktop Boards are evaluated as Information Technology Equipment (I.T.E.)
for use in personal computers (PC) for installation in homes, offices, schools, computer
rooms, and similar locations. The suitability of this product for other PC or embedded
non-PC applications or other environments, such as medical, industrial, alarm systems,
test equipment, etc. may not be supported without further evaluation by Intel.

Document Organization
The chapters in this Product Guide are arranged as follows:
1

Desktop Board Features: a summary of product features

Installing and Replacing Desktop Board Components: instructions on how to install
the Desktop Board and other hardware components

Updating the BIOS: instructions on how to update the BIOS

Error Messages and Indicators: information about BIOS error messages and beep
codes

Regulatory Compliance: describes the board’s adherence to safety standards and
EMC regulations and its product certifications

Conventions
The following conventions are used in this manual:

CAUTION
Cautions warn the user about how to prevent damage to hardware or loss of data.

NOTE
Notes call attention to important information.

iii

Intel Desktop Board DH55HC Product Guide

Terminology
The table below gives descriptions of some common terms used in the product guide.
Term

Description

Gigabyte (1,073,741,824 bytes)

GHz

Gigahertz (one billion hertz)

Kilobyte (1024 bytes)

Megabyte (1,048,576 bytes)

Megabit (1,048,576 bits)

MHz

Megahertz (one million hertz)

Contents
1 Desktop Board Features
Supported Operating Systems..............................................................................11
Desktop Board Components.................................................................................12
Processor..........................................................................................................14
Intel® H55 Express Chipset .................................................................................14
Main Memory.....................................................................................................15
Graphics Subsystem ...........................................................................................15
Integrated Graphics ....................................................................................15
Analog Display (VGA)...........................................................................15
High-Definition Multimedia Interface* (HDMI*)........................................16
Digital Visual Interface (DVI-D) .............................................................16
PCI Express* x16 Graphics ..........................................................................16
Audio Subsystem ...............................................................................................17
LAN Subsystem .................................................................................................17
USB 2.0 Support ................................................................................................18
Serial ATA Support .............................................................................................18
Expandability.....................................................................................................19
Legacy I/O ........................................................................................................19
BIOS ................................................................................................................19
Serial ATA Auto Configuration.......................................................................19
PCI*/PCI Express Auto Configuration.............................................................19
Security Passwords .....................................................................................20
Hardware Management .......................................................................................20
Hardware Monitoring and Fan Speed Control ..................................................20
Fan Monitoring ...........................................................................................20
Chassis Intrusion........................................................................................21
Power Management ............................................................................................21
Software Support .......................................................................................21
ACPI..................................................................................................21
Hardware Support ......................................................................................21
Power Connectors ...............................................................................21
Fan Headers .......................................................................................22
LAN Wake Capabilities..........................................................................22
Instantly Available PC Technology..........................................................22
+5 V Standby Power Indicator LED ........................................................23
Wake from USB ..................................................................................24
PCI PME# Signal Wake-up Support ........................................................24
PCI Express WAKE# Signal Wake-up Support ..........................................24
Wake from PS/2 Devices ......................................................................24
Wake from Serial Port ..........................................................................24
ENERGY STAR*, e-Standby, and ErP Compliance.............................................24
Speaker............................................................................................................25
Real-Time Clock Subsystem.................................................................................25

Intel Desktop Board DH55HC Product Guide

2 Installing and Replacing Desktop Board Components
Before You Begin ...............................................................................................27
Installation Precautions.......................................................................................28
Prevent Power Supply Overload ....................................................................28
Observe Safety and Regulatory Requirements.................................................28
Installing the I/O Shield ......................................................................................29
Installing and Removing the Desktop Board ...........................................................30
Installing and Removing a Processor .....................................................................31
Installing a Processor ..................................................................................31
Installing a Processor Fan Heat Sink ..............................................................36
Connecting the Processor Fan Heat Sink Cable................................................36
Removing the Processor ..............................................................................36
Installing and Removing System Memory ..............................................................37
Guidelines for Dual Channel Memory Configuration ..........................................37
Two or Four DIMMs .............................................................................37
Three DIMMs ......................................................................................38
Installing DIMMs ........................................................................................39
Removing DIMMs........................................................................................41
Installing and Removing PCI Express x16 Graphics Cards.........................................41
Installing a PCI Express x16 Graphics Card ....................................................41
Removing a PCI Express x16 Graphics Card....................................................42
Connecting Serial ATA (SATA) Cables....................................................................44
Installing an Intel® Z-U130 USB Solid-State Drive (or Compatible Device)..................45
Connecting to the Internal Headers ......................................................................46
Front Panel Audio Header ............................................................................47
Internal Mono Speaker Header .....................................................................47
S/PDIF Header ...........................................................................................48
Parallel Port Header ....................................................................................48
Chassis Intrusion Header .............................................................................49
Intel® RPAT Header.....................................................................................49
Alternate Front Panel Power LED Header ........................................................49
Front Panel Header .....................................................................................50
Front Panel USB 2.0 Headers........................................................................50
Serial Header .............................................................................................51
Connecting to the Audio System...........................................................................52
Connecting Chassis Fan and Power Supply Cables...................................................53
Connecting Chassis Fan Cables .....................................................................53
Connecting Power Supply Cables ..................................................................54
Setting the BIOS Configuration Jumper .................................................................55
Clearing Passwords ............................................................................................56
Replacing the Battery .........................................................................................57

3 Updating the BIOS
Updating the BIOS with the Intel® Express BIOS Update Utility.................................63
Updating the BIOS with the ISO Image BIOS Update File or the Iflash
Memory Update Utility...................................................................................64
Obtaining the BIOS Update File ....................................................................64
Updating the BIOS with the ISO Image BIOS Update File .................................65
Updating the BIOS with the Iflash Memory Update Utility .................................66
Recovering the BIOS ...................................................................................66

Contents

A Error Messages and Indicators
BIOS Error Codes...............................................................................................67
BIOS Error Messages ..........................................................................................68

B Regulatory Compliance
Safety Standards ...............................................................................................69
Place Battery Marking .................................................................................69
European Union Declaration of Conformity Statement..............................................70
Product Ecology Statements ................................................................................71
Recycling Considerations .............................................................................71
Lead-free 2LI/Pb-free 2LI Board ...................................................................74
Restriction of Hazardous Substances (RoHS) ..................................................75
EU RoHS ............................................................................................75
China RoHS ........................................................................................76
EMC Regulations ................................................................................................78
Ensure Electromagnetic Compatibility (EMC) Compliance ..................................79
Product Certifications..........................................................................................80
Board-Level Certification Markings ................................................................80
Chassis and Component Certifications............................................................81

Figures
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.

Intel Desktop Board DH55HC Components .......................................................12
LAN Connector LEDs .....................................................................................18
Location of the Standby Power Indicator ..........................................................23
Installing the I/O Shield ................................................................................29
Intel Desktop Board DH55HC Mounting Screw Hole Locations..............................30
Unlatch the Socket Lever ...............................................................................31
Lift the Load Plate.........................................................................................32
Remove the Socket Cover..............................................................................33
Remove the Processor from the Protective Cover ..............................................34
Install the Processor .....................................................................................34
Lower the Load Plate.....................................................................................35
Secure the Load Plate in Place ........................................................................35
Connecting the Processor Fan Heat Sink Power Cable to the
Processor Fan Header....................................................................................36
Example Dual Channel Memory Configuration with Two DIMMs ...........................37
Example Dual Channel Memory Configuration with Four DIMMs ...........................38
Example Dual Channel Memory Configuration with Three DIMMs .........................38
Use DDR3 DIMMs .........................................................................................39
Installing a DIMM .........................................................................................40
Installing a PCI Express x16 Graphics Card ......................................................42
Removing a PCI Express x16 Graphics Card......................................................43
Connecting a Serial ATA Cable........................................................................44
Installing an Intel Z-U130 USB Solid-State Drive (or Compatible Device) ..............45
Internal Headers ..........................................................................................46
Back Panel Audio Connectors .........................................................................52
Location of the Chassis Fan Headers................................................................53
Connecting Power Supply Cables ....................................................................54
Location of the BIOS Configuration Jumper Block ..............................................55
Removing the Battery ...................................................................................62
Intel Desktop Board DH55HC China RoHS Material Self Declaration Table .............77

vii

Intel Desktop Board DH55HC Product Guide

Tables
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
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24.

viii

Feature Summary.......................................................................................... 9
Intel Desktop Board DH55HC Components .......................................................13
LAN Connector LEDs .....................................................................................18
Front Panel Audio Signal Names for Intel HD Audio............................................47
Front Panel Audio Header Signal Names for AC ’97 Audio ...................................47
Internal Mono Speaker Header .......................................................................47
S/PDIF Header Signal Names .........................................................................48
Parallel Port Header ......................................................................................48
Chassis Intrusion Header Signal Names ...........................................................49
Intel RPAT Header Signal Names ....................................................................49
Alternate Front Panel Power LED Header Signal Names ......................................49
Front Panel Header Signal Names ...................................................................50
USB 2.0 Header Signal Names........................................................................50
Front Panel USB Header (with Intel Z-U130 USB Solid-State Drive
(or Compatible Device) Support) Signal Names.................................................51
Serial Port Header ........................................................................................51
Jumper Settings for the BIOS Setup Program Modes..........................................56
BIOS Beep Codes .........................................................................................67
Front-panel Power LED Blink Codes .................................................................68
BIOS Error Messages ....................................................................................68
Safety Standards..........................................................................................69
Lead-Free Second Level Interconnect Marks .....................................................75
China RoHS Environmentally Friendly Use Period Mark .......................................76
EMC Regulations...........................................................................................78
Product Certification Markings ........................................................................80

1 Desktop Board Features
This chapter briefly describes the features of Intel® Desktop Board DH55HC. Table 1
summarizes the major features of the Desktop Board.
Table 1. Feature Summary
Form Factor

ATX (304.80 millimeters [12.00 inches] x 243.84 millimeters
[9.60 inches])

Processor

• Intel® Core™ i7, Intel® Core™ i5, Intel® Core™ i3, and
Intel® Pentium processors in an LGA1156 socket:
― Integrated graphics processing (processors with Intel® Graphics
Technology)
― External graphics interface controller
―

Integrated memory controller
®

Chipset

Intel H55 Express Chipset consisting of the Intel® H55 Express
Platform Controller Hub (PCH)

Memory

• Four 240-pin DDR3 SDRAM Dual Inline Memory Module (DIMM)
sockets
• Support for DDR3 1333 MHz and DDR3 1066 MHz DIMMs
• Support for 1 Gb and 2 Gb memory technology
• Support for up to 16 GB of system memory with four DIMMs using
2 Gb memory technology
• Support for non-ECC memory

Graphics

• Integrated graphics support for processors with Intel Graphics
Technology:
― VGA
― High-Definition Multi-media Interface* (HDMI*)
― DVI-D
• Discrete graphics support for PCI Express* 2.0 x16 add-in graphics
card

Audio

Intel® High Definition Audio via the Realtek* ALC888S audio codec and
the HDMI interface

Expansion
Capabilities

• One PCI Express 2.0 x16 add-in card connector
• Two PCI Express 2.0 x1 add-in card connectors
• Three PCI* bus connectors
continued

Intel Desktop Board DH55HC Product Guide

Table 1. Feature Summary (continued)
Peripheral
Interfaces

• Twelve USB 2.0 ports:
―

Six ports are implemented with stacked back panel connectors

―

Six ports are implemented with three dual-port internal
headers; one header supports an Intel Z-U130 USB Solid-State
Drive (or compatible device)

• Six Serial ATA (SATA) 3.0 Gb/s ports, two ports compatible with
eSATA adapters
• One serial port header
• One parallel port header
• One PS/2 back panel connector
LAN Support

Intel® 82578DC Gigabit (10/100/1000 Mb/s) Ethernet LAN controller
including an RJ-45 back panel connector with integrated status LEDs

BIOS

• Intel® BIOS resident in an SPI Flash device
• Support for Advanced Configuration and Power Interface (ACPI),
Plug and Play, and SMBIOS

Instantly Available
PC Technology

• Support for PCI Local Bus Specification Revision 2.2
• Support for PCI Express Base Specification Revision 2.0
• Suspend to RAM support
• Wake on PCI, PCI Express, LAN, front panel, PS/2, serial, and USB
ports

Hardware
Management

• Intel® Quiet System Technology (Intel® QST) implemented through
the Intel® Management Engine (Intel® ME) in the H55 PCH
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Three fan headers using PWM control
• 4-pin headers for processor, front, and rear fans
• 4-wire and 3-wire (linear) fan speed control support for front and
rear fans
• Support for Platform Environmental Control Interface (PECI)

Desktop Board Features

Supported Operating Systems
The Desktop Board supports the following operating systems:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft
Microsoft

Windows* 7 Ultimate 64-bit edition
Windows 7 Ultimate 32-bit edition
Windows 7 Home Basic 64-bit edition
Windows 7 Home Premium 64-bit edition
Windows 7 Home Premium 32-bit edition
Windows 7 Home Basic 32-bit edition
Windows Vista* Ultimate 32-bit edition
Windows Vista Business 32-bit edition
Windows Vista Home Premium 32-bit edition
Windows Vista Home Basic 32-bit edition
Windows Vista Ultimate 64-bit edition
Windows Vista Business 64-bit edition
Windows Vista Home Premium 64-bit edition
Windows Vista Home Basic 64-bit edition
Windows* XP Media Center Edition 2005
Windows XP Professional
Windows XP Professional x64 Edition
Windows XP Home

Intel Desktop Board DH55HC Product Guide

Desktop Board Components
Figure 1 shows the approximate location of the major components on Intel Desktop
Board DH55HC.

Figure 1. Intel Desktop Board DH55HC Components

Desktop Board Features

Table 2. Intel Desktop Board DH55HC Components
Label

Description

PCI bus add-in card connector

PCI bus add-in connector

PCI Express 2.0 x1 add-in card connector

Battery

PCI Express 2.0 x1 add-in card connector

PCI Express 2.0 x16 add-in card connector

Back panel connectors

12 V processor core voltage connector (2 x 2 pin)

Rear chassis fan header

Processor socket

Processor fan header

DDR3 Channel A, DIMM 0 and DIMM 1 sockets

DDR3 Channel B, DIMM 0 and DIMM 1 sockets

Front chassis fan header

Main power connector (2 x 12 pin)

Chassis intrusion header

Intel® Remote PC Assist Technology (Intel® RPAT) header

Serial ATA connectors (6)

BIOS configuration jumper block

Alternate front panel power LED header

Front panel header

Standby power indicator LED

Front panel USB 2.0 headers (2)

Front panel USB header with support for an Intel Z-U130 USB Solid-State
Drive (or compatible device)

Parallel port header

Speaker

Serial port header

S/PDIF header

Front panel audio header

Internal mono speaker header

Intel Desktop Board DH55HC Product Guide

Online Support
For more information on Intel Desktop Board DH55HC consult the following online
resources:
• Intel Desktop Board DH55HC

http://www.intel.com/products/motherboard/DH55HC
/index.htm

• Desktop Board Support

http://support.intel.com/support/motherboards/deskt
op/DH55HC

• Available configurations for Intel
Desktop Board DH55HC

http://www.intel.com/products/motherboard/DH55HC
/index.htm

• Supported processors

http://processormatch.intel.com

• Chipset information

http://www.intel.com/products/desktop/chipsets/inde
x.htm

• BIOS and driver updates

http://downloadcenter.intel.com/

• Integration information

http://www.intel.com/support/go/buildit

Processor
CAUTION
Failure to use an appropriate power supply and/or not connecting the 12 V (2 x 2 pin)
power connector to the Desktop Board may result in damage to the board, or the
system may not function properly.
Intel Desktop Board DH55HC supports the Intel Core i7, and Intel Core i5, Intel Core
i3, and Intel Pentium processors in an LGA1156 socket. Processors are not included
with the Desktop Board and must be purchased separately. The processor connects to
the Desktop Board through the LGA1156 socket.
For information on supported processors for Intel Desktop Board DH55HC, go to
http://processormatch.intel.com.

Intel® H55 Express Chipset
The Intel H55 Express Chipset, consisting of the Intel H55 Platform Controller Hub
(PCH), provides interfaces to the processor and the USB, SATA, LPC, audio, network,
display, PCI, and PCI Express x1 interfaces. The PCH is a centralized controller for the
board’s I/O paths.

Desktop Board Features

Main Memory
NOTE
To be fully compliant with all applicable Intel ® SDRAM memory specifications, the
board should be populated with DIMMs that support the Serial Presence Detect (SPD)
data structure. If your memory modules do not support SPD, you will see a
notification to this effect on the screen at power up. The BIOS will attempt to
configure the memory controller for normal operation.
The board has four DIMM sockets and supports the following memory features:
•
•
•
•
•
•

Two independent memory channels with interleaved mode support
Support for non-ECC, unbuffered, single-sided or double-sided DIMMs with x8
organization
16 GB maximum total system memory (with 2 Gb memory technology)
Minimum total system memory: 1 GB using 1 Gb x8 module
Serial Presence Detect
DDR3 1333 MHz and DDR3 1066 MHz SDRAM DIMMs

NOTE
32-bit operating systems are limited to a maximum of 4 GB of memory. These
operating systems will report less than 4 GB because of the memory used by
add-in graphics cards and other system resources.

NOTE
When using a processor without Intel Graphics Technology, memory must be installed
in either or both of the DIMM 0 (blue) memory sockets for the system to boot.

Graphics Subsystem
The board supports either integrated graphics (Intel Graphics Technology) or PCI
Express 2.0 x16 graphics.

Integrated Graphics
The board supports integrated graphics through the Intel Flexible Display Interface
(FDI) for processors with Intel Graphics Technology.

Analog Display (VGA)
The VGA port supports analog displays. The maximum supported resolution is 2048 x
1536 (QXGA) at a 75 Hz refresh rate.
The VGA port is enabled for the POST whenever a monitor is attached, regardless of
the HDMI and DVI connector status.

Intel Desktop Board DH55HC Product Guide

High-Definition Multimedia Interface* (HDMI*)
The HDMI port supports standard, enhanced, or high-definition video, plus multichannel digital audio on a single cable. It is compatible with all ATSC and DVB HDTV
standards and supports 8-channel digital audio. The maximum supported resolution is
1920 x 1200 at 60 Hz refresh (WUXGA). The HDMI port is compliant with the
HDMI 1.3 specification.
The HDMI port is enabled for the POST whenever a monitor is attached, regardless of
the VGA and DVI connector status.

Digital Visual Interface (DVI-D)
The DVI-D port supports digital DVI displays. The maximum supported resolution is
1920 x 1200 at 60 Hz refresh (WUXGA). The DVI-D port is compliant with the DVI 1.0
specification.
The DVI-D port is only enabled for POST when there are no monitors attached to the
VGA or HDMI connectors.

PCI Express* x16 Graphics
The Intel Core i7, Intel Core i5, Intel Core i3, and Intel Pentium processors in an
LGA1156 socket support discrete add-in graphics cards via the PCI Express 2.0 x16
add-in card connector. The board supports the following PCI Express speeds:
•

•

PCI Express GEN2 frequency of 2.5 GHz which results in 5.0 Gb/s in each direction
(500 MB/s) per lane. The maximum theoretical bandwidth on the interface is
8 GB/s in each direction, simultaneously, when operating in x16 mode.
PCI Express GEN1 frequency of 1.25 GHz resulting in 2.5 Gb/s each direction
(250 MB/s) per lane. The maximum theoretical bandwidth on the interface is
4 GB/s in each direction, simultaneously, when operating in x16 mode.

Desktop Board Features

Audio Subsystem
The board supports Intel High Definition Audio through a Realtek ALC888S audio codec
as well as through the HDMI interface.
The Realtek ALC888S-based audio subsystem provides the following features:
•

•
•
•

Advanced jack sense for the back panel audio connectors that enables the audio
codec to recognize the device that is connected to an audio port. The back panel
audio connectors are capable of retasking according to the user’s definition, or can
be automatically switched depending on the recognized device type.
Stereo input and output via back panel connectors
Headphone and Mic in functions for front panel audio connectors
A signal-to-noise (S/N) ratio of 90 dB

The board provides onboard audio headers and back panel connectors.
The onboard audio headers include the following:
•
•
•

Front panel audio (a 2 x 5 pin header that provides headphone and mic in signals
for front panel audio connectors)
S/PDIF audio header (1 x 4 pin header)
Internal mono speaker header (1 x 2 pin header)

Front panel headphone output is supported by a separate audio channel pair, allowing
multi-streaming audio configurations such as simultaneous 6-channel (5.1) surround
sound playback and stereo audio conferencing (through speakers connected to the
back panel audio connectors and a headset connected to front panel audio
connectors).
The onboard internal mono speaker header allows connection to an internal, lowpower speaker for basic system sound capability. The subsystem is capable of driving
a target speaker load of 8 Ω at 1 W (rms) or 4 Ω at 1.5 W (rms).
The onboard S/PDIF header allows connection to coaxial or optical adapters for digital
audio output.
The back panel audio connectors are configurable through the audio device drivers.
Audio software and drivers are available from http://downloadcenter.intel.com/.

LAN Subsystem
The LAN subsystem includes:
•
•

Intel 82578DC Gigabit (10/100/1000 Mb/s) Ethernet LAN controller
RJ-45 LAN connector with integrated status LEDs

LAN software and drivers are available at http://downloadcenter.intel.com/.
Two LEDs are built into the RJ-45 LAN connector located on the back panel (see
Figure 2). These LEDs indicate the status of the LAN as shown in Table 3.

Intel Desktop Board DH55HC Product Guide

Figure 2. LAN Connector LEDs
Table 3. LAN Connector LEDs
LED

LED Color

LED State

Indicates

A (Link/Activity)

Green

Off

LAN link is not established

LAN link is established

Blinking

LAN activity is occurring

N/A

Off

10 Mb/s data rate

Green

100 Mb/s data rate

Yellow

1000 Mb/s data rate

B (Link Speed)

USB 2.0 Support
The board supports up to twelve USB 2.0 ports provided by two EHCI host controllers
in the PCH that allow the use of EHCI-compatible drivers.
The port arrangement is as follows:
•
•

Six ports via stacked back panel connectors
Six front panel ports via three dual-port internal headers; one header supports an
Intel Z-U130 USB Solid-State Drive (or compatible device)

USB 2.0 support requires both an operating system and drivers that fully support
USB 2.0 transfer rates.

Serial ATA Support
The board provides six internal SATA connectors through the PCH, four for internal
storage (black connectors) and two for internal as well as external SATA (eSATA)
storage (red connectors).

Desktop Board Features

Expandability
Intel Desktop Board DH55HC provides the following expansion capability:
•
•
•

One PCI Express 2.0 x16 port
Two PCI Express 2.0 x1 ports
Three PCI bus interfaces

Legacy I/O
The board’s Legacy I/O Controller provides the following legacy features:
•
•
•
•
•
•

One serial port header
One parallel port header with Extended Capabilities Port (ECP) and Enhanced
Parallel Port (EPP) support
Serial IRQ interface compatible with serialized IRQ support for PCI Conventional
bus systems
PS/2-style keyboard/mouse interface
Intelligent power management, including a programmable wake-up event interface
PCI Conventional bus power management support

The BIOS Setup program provides configuration options for the Legacy I/O controller.

BIOS
The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, and the
PCI Express and SATA auto-configuration utilities. The BIOS is stored in the Serial
Peripheral Interface (SPI) Flash device.
The BIOS can be updated by following the instructions in Chapter 3 starting on
page 63.

Serial ATA Auto Configuration
If you install a Serial ATA device (such as a hard drive) in your computer, the autoconfiguration utility in the BIOS automatically detects and configures the device for
your computer. You do not need to run the BIOS Setup program after installing a
Serial ATA device. You can override the auto-configuration options by specifying
manual configuration in the BIOS Setup program.

PCI*/PCI Express Auto Configuration
If you install a PCI or PCI Express add-in card in your computer, the PCI/PCI Express
auto-configuration utility in the BIOS automatically detects and configures the
resources (IRQs, DMA channels, and I/O space) for that add-in card. You do not need
to run the BIOS Setup program after you install a PCI or PCI Express add-in card.

Intel Desktop Board DH55HC Product Guide

Security Passwords
The BIOS includes security features that restrict whether the BIOS Setup program can
be accessed and who can boot the computer. A supervisor password and a user
password can be set for the BIOS Setup and for booting the computer, with the
following restrictions:
•

•

The supervisor password gives unrestricted access to view and change all Setup
options. If only the supervisor password is set, pressing at the password
prompt of Setup gives the user restricted access to Setup.
If both the supervisor and user passwords are set, you must enter either the
supervisor password or the user password to access Setup. Setup options are then
available for viewing and changing depending on whether the supervisor or user
password was entered.
Setting a user password restricts who can boot the computer. The password
prompt is displayed before the computer is booted. If only the supervisor
password is set, the computer boots without asking for a password. If both
passwords are set, you can enter either password to boot the computer.

For instructions on resetting the password, go to Clearing Passwords on page 56.

Hardware Management
The hardware management features of Intel Desktop Board DH55HC enable the board
to be compatible with the Wired for Management (WfM) specification. The board has
several hardware management features including the following:
•
•
•

Fan speed monitoring and control
Thermal and voltage monitoring
Chassis intrusion detection

Hardware Monitoring and Fan Speed Control
The features of the hardware monitoring and fan speed control include:
•
•
•
•

Intel Quiet System Technology, delivering acoustically-optimized thermal
management
Thermal sensors in the processor and PCH, as well as near the CPU voltage
regulators and system memory
Monitoring of system voltages to detect levels above or below acceptable values
Thermally monitored closed-loop fan control for all three fans that can adjust fan
speed as needed

Fan Monitoring
Fan monitoring can be observed via the BIOS Setup program, Intel® Desktop Utilities,
or third-party software.

Desktop Board Features

Chassis Intrusion
The board supports a chassis security feature that detects if the chassis cover has
been removed. The security feature uses a mechanical switch on the chassis that can
be connected to the chassis intrusion header on the Desktop Board. See Figure 1 for
the location of the chassis intrusion header.

Power Management
Power management is implemented at several levels, including software support
through the Advanced Configuration and Power Interface (ACPI) and the following
hardware support:
•
•
•
•
•
•
•
•
•
•

Power connectors
Fan headers
LAN wake capabilities
Instantly Available PC technology (Suspend to RAM)
+5 V standby power indicator LED
Wake from USB
PCI Power Management Event signal (PME#) wakeup support
PCI Express WAKE# signal support
Wake from PS/2 devices
Wake from serial port

Software Support
ACPI
ACPI gives the operating system direct control over the power management and Plug
and Play functions of a computer. The use of ACPI with the Desktop Board requires an
operating system that provides full ACPI support.

Hardware Support
Power Connectors
ATX12V-compliant power supplies can turn off the computer power through system
control. When an ACPI-enabled computer receives the correct command, the power
supply removes all non-standby voltages.
When resuming from an AC power failure, the computer returns to the power state it
was in before power was interrupted (either on or off). The computer’s response can
be set by using the Last Power State feature in the BIOS Setup program’s Boot menu.
The Desktop Board has two power connectors. See Figure 26 on page 54 for the
location of the power connectors.

Intel Desktop Board DH55HC Product Guide

Fan Headers
The function/operation of the fans is as follows:
•
•
•
•
•
•
•

The fans are on when the board is in the ACPI S0 or S1 state.
The fans are off when the computer is in the ACPI S3, S4, or S5 state.
Each fan header is wired to a tachometer input.
All fan headers support closed-loop fan control that can adjust the fan speed or
switch the fan on or off as needed.
All fan headers have a +12 V DC connection (up to 12 V DC when using 3-wire
chassis fans.
All fan headers are controlled by Pulse Width Modulation.
The front and rear chassis fans support Linear Fan Control on 3-wire fans.

The Desktop Board has a 4-pin processor fan header and two 4-pin chassis fan
headers compatible with 4-wire and 3-wire chassis fans.

LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the 5 V standby line for the power supply must be capable
of delivering adequate +5 V standby current. Failure to provide adequate standby
current when using this feature can damage the power supply.
LAN wakeup capabilities enable remote wake-up of the computer through a network.
The LAN subsystem monitors network traffic and upon detecting a Magic Packet*
frame, it asserts a wake-up signal that powers up the computer.

Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the 5 V standby line for the power supply must
be capable of delivering adequate +5 V standby current. Failure to provide adequate
standby current when using this feature can damage the power supply and/or effect
ACPI S3 sleep state functionality.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-toRAM) sleep state. Instantly Available PC technology enables the board to enter the
ACPI S3 (Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the computer will
appear to be off (the power supply is off and the front panel power LED will behave as
configured by the BIOS “S3 State Indicator” option). When signaled by a wake-up
device or event, the system quickly returns to its last known wake state. When
signaled by a wake-up device or event, the computer quickly returns to its last known
awake state.

Desktop Board Features

The Desktop Board supports the PCI Bus Power Management Interface Specification.
Add-in cards that support this specification can participate in power management and
can be used to wake the computer.
The use of Instantly Available PC technology requires operating system support and
PCI 2.2 compliant add-in cards, PCI Express add-in cards, and drivers.

+5 V Standby Power Indicator LED
CAUTION
If the AC power has been switched off and the standby power indicator is still lit,
disconnect the power cord before installing or removing any devices connected to the
board. Failure to do so could damage the board and any attached devices.
The Desktop Board’s standby power indicator, shown in Figure 3, is lit when there is
standby power still present on the board even when the computer appears to be off.
For example, when this green LED is lit, standby power is still present at the memory
module sockets and the PCI bus connectors.

Figure 3. Location of the Standby Power Indicator
For more information on standby current requirements for the Desktop Board, refer to
the Technical Product Specification at
http://support.intel.com/support/motherboards/desktop/

Intel Desktop Board DH55HC Product Guide

Wake from USB
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB
and an operating system that supports Wake from USB.
USB bus activity wakes the computer from an ACPI S1 or S3 state.

PCI PME# Signal Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an
ACPI S1, S3, S4, or S5 state.

PCI Express WAKE# Signal Wake-up Support
When the WAKE# signal on a PCI Express bus add-in card is asserted, the computer
wakes from an ACPI S1, S3, S4, or S5 state.

Wake from PS/2 Devices
PS/2 device activity can wake the computer from an ACPI S1, S3, S4, or S5 state.
When the computer is in the S4 state, any key can be used to wake the computer
provided a supported operating system is installed. When the computer is in the S5
state, the only PS/2 activity that will wake the computer is either the Alt-Print Screen
key combination or the “Power” key that is available on some keyboards. The BIOS
can be used to select between either of the key combinations.

Wake from Serial Port
Serial port activity wakes the computer from an ACPI S1 or S3 state.

ENERGY STAR*, e-Standby, and ErP Compliance
The US Department of Energy and the US Environmental Protection Agency have
continually revised the ENERGY STAR requirements. Intel has worked directly with
these two governmental agencies in the definition of the new requirements.
Intel Desktop Board DH55HC meets the following program requirements in an
adequate system configuration, including appropriate selection of an efficient power
supply:
•
•
•
•

Energy Star v5.0, category A
EPEAT “Eco-Smart”
Korea E-Standby
European Union ErP

For information about ENERGY STAR requirements and recommended configurations,
go to http://www.intel.com/go/energystar.

Desktop Board Features

Speaker
A speaker is mounted on the Desktop Board. The speaker provides audible error code
(beep code) information during the Power-On Self-Test (POST). Refer to Appendix A
for a description of the board’s beep codes.

Real-Time Clock Subsystem
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery.
The clock is accurate to ± 13 minutes/year at 25 ºC with standby power applied by the
power supply.

NOTE
If the battery and AC power fail, date and time values will be reset and the user will be
notified during the POST.
When the battery voltage drops below a certain level, the BIOS Setup program
settings stored in CMOS RAM (for example, the date and time) might not be accurate.
Replace the battery with an equivalent one. Go to page 57 for instructions on how to
replace the battery.

Intel Desktop Board DH55HC Product Guide

2 Installing and Replacing Desktop
Board Components
This chapter tells you how to:
•
•
•
•
•
•
•
•
•
•
•
•
•

Install the I/O shield
Install and remove the Desktop Board
Install and remove a processor
Install and remove memory
Install and remove a PCI Express x16 card
Connect Serial ATA cables
Install an Intel Z-U130 USB Solid-State Drive (or Compatible Device)
Connect to the internal headers and connectors
Connect to the audio system
Connect chassis fan and power supply cables
Set the BIOS configuration jumper
Clear passwords
Replace the battery

Before You Begin
CAUTIONS
The procedures in this chapter assume familiarity with the general terminology
associated with personal computers and with the safety practices and regulatory
compliance required for using and modifying electronic equipment.
Disconnect the computer from its power source and from any telecommunications
links, networks, or modems before performing any of the procedures described in this
chapter. Failure to disconnect power, telecommunications links, networks, or modems
before you open the computer or perform any procedures can result in personal injury
or equipment damage. Some circuitry on the board can continue to operate even
though the front panel power button is off.
Follow these guidelines before you begin:
•
•
•

Always follow the steps in each procedure in the correct order.
Set up a log to record information about your computer, such as model, serial
numbers, installed options, and configuration information.
Electrostatic discharge (ESD) can damage components. Perform the procedures
described in this chapter only at an ESD workstation using an antistatic wrist strap
and a conductive foam pad. If such a station is not available, you can provide
some ESD protection by wearing an antistatic wrist strap and attaching it to a
metal part of the computer chassis.

Intel Desktop Board DH55HC Product Guide

Installation Precautions
When you install and test the Intel Desktop Board, observe all warnings and cautions
in the installation instructions.
To avoid injury, be careful of:
•
•
•
•
•

Sharp pins on connectors
Sharp pins on printed circuit assemblies
Rough edges and sharp corners on the chassis
Hot components (such as processors, voltage regulators, and heat sinks)
Damage to wires that could cause a short circuit

Observe all warnings and cautions that instruct you to refer computer servicing to
qualified technical personnel.

Prevent Power Supply Overload
Do not overload the power supply output. To avoid overloading the power supply,
make sure that the calculated total current loads of all the modules within the
computer is less than the output current rating of each of the power supplies output
circuits plus enough headroom for desktop board power consumption.

Observe Safety and Regulatory Requirements
Read and follow the instructions in this section and the instructions supplied with the
chassis and associated modules. If you do not follow these instructions and the
instructions provided by the chassis and module suppliers, you increase your safety
risk and the possibility of noncompliance with regional laws and regulations. If the
instructions for the chassis are inconsistent with these instructions or the instructions
for associated modules, contact the supplier to find out how you can ensure that your
computer meets safety and regulatory requirements.
For information about the Desktop Board’s regulatory compliance, refer to Appendix B.

Installing and Replacing Desktop Board Components

Installing the I/O Shield
The Desktop Board comes with an I/O shield. When installed in the chassis, the shield
blocks radio frequency transmissions, protects internal components from dust and
foreign objects, and promotes correct airflow within the chassis.
Install the I/O shield before installing the Desktop Board in the chassis. Place the
shield inside the chassis as shown in Figure 4. Press the shield into place so that it fits
tightly and securely. If the shield does not fit, obtain a properly sized shield from the
chassis supplier.

Figure 4. Installing the I/O Shield

Intel Desktop Board DH55HC Product Guide

Installing and Removing the Desktop Board
CAUTION
Only qualified technical personnel should perform this procedure. Disconnect the
computer from its power source before performing the procedures described here.
Failure to disconnect the power before you open the computer can result in personal
injury or equipment damage.
Refer to your chassis manual for instructions on installing and removing the Desktop
Board.
Figure 5 shows the location of the mounting screw holes for Intel Desktop Board
DH55HC.

Figure 5. Intel Desktop Board DH55HC Mounting Screw Hole Locations

Installing and Replacing Desktop Board Components

Installing and Removing a Processor
Instructions on how to install the processor on the Desktop Board are given below.

Installing a Processor
CAUTION
Before installing or removing a processor, make sure the AC power has been removed
by unplugging the power cord from the computer; the standby power LED should not
be lit (see Figure 3 on page 23). Failure to do so could damage the processor and the
board.
To install a processor, follow these instructions:
1. Observe the precautions in "Before You Begin" on page 27.
2. Unlatch the socket lever by pushing the lever down and away from the socket
(Figure 6, A and B).

Figure 6. Unlatch the Socket Lever

Intel Desktop Board DH55HC Product Guide

3. Rotate the socket lever to lift the load plate away from the socket (Figure 7, A).
Make sure that the load plate is in the fully open position (Figure 7, B) while being
careful not to damage adjacent components.

Figure 7. Lift the Load Plate

Installing and Replacing Desktop Board Components

4. Remove the protective socket cover from the socket by placing your thumb against
the front edge of the cover and resting your index finger on the rear grip
(Figure 8, A). Lift the front edge of the socket to disengage the cover from the
socket and lift the cover up and away from the socket (Figure 8, B). Do not touch
the socket contacts.

NOTE
Do not discard the socket cover; save it for possible future use. Always replace
the socket cover if you remove the processor from the socket.

Figure 8. Remove the Socket Cover

Intel Desktop Board DH55HC Product Guide

5. Remove the processor from its protective cover. Hold the processor only at the
edges, being careful not to touch the bottom of the processor (see Figure 9).

NOTE
Do not discard the processor cover. Always replace the processor cover if you
remove the processor from the socket.

Figure 9. Remove the Processor from the Protective Cover
6. Hold the processor with your thumb and index finger oriented as shown in
Figure 10 to align your fingers with the socket finger cutouts. Make sure that the
processor Pin 1 indicator (gold triangle) is aligned with the Pin 1 chamfer on the
socket (Figure 10, B) and that the notches on the processor align with the posts on
the socket (Figure 10, C). Lower the processor straight down without tilting or
sliding it in the socket (Figure 10, A).

Figure 10. Install the Processor

Installing and Replacing Desktop Board Components

7. Lower the load plate over the processor while leaving the socket lever in the open
position (Figure 11).

Figure 11. Lower the Load Plate
8. Lower the socket lever (Figure 12, B) while making sure that the front edge of the
load plate slides under the shoulder screw cap as the lever is lowered
(Figure 12, A). Latch the socket lever under the load plate tab (Figure 12, C, D).

Figure 12. Secure the Load Plate in Place

Intel Desktop Board DH55HC Product Guide

Installing a Processor Fan Heat Sink
Intel Desktop Board DH55HC has mounting holes for a processor fan heat sink. For
instructions on how to attach the processor fan heat sink to the Desktop Board, refer
to the boxed processor manual or boxed thermal solution manual.

Connecting the Processor Fan Heat Sink Cable
Connect the processor fan heat sink power cable to the 4-pin processor fan header
(see Figure 13). A fan with a 4-pin connector as shown in Figure 13 is recommended.

Figure 13. Connecting the Processor Fan Heat Sink Power Cable to the
Processor Fan Header

Removing the Processor
For instructions on how to remove the processor fan heat sink and processor, refer to
the processor installation manual.

Installing and Replacing Desktop Board Components

Installing and Removing System Memory
Desktop board DH55HC has four 240-pin DDR3 DIMM sockets arranged as DIMM 0 and
DIMM 1 in both Channel A and Channel B.

NOTE
A DIMM must be present in at least one of the DIMM 0 sockets when you are using
only one or two DIMMs with a processor that does not support Intel Graphics
Technology.

Guidelines for Dual Channel Memory Configuration
Before installing DIMMs, read and follow these guidelines for dual channel memory
configuration.

Two or Four DIMMs
Install a matched pair of DIMMs equal in speed and size (see Figure 14) in the DIMM 0
(blue) sockets of channels A and B.

Figure 14. Example Dual Channel Memory Configuration with Two DIMMs
If additional memory is to be used, install another matched pair of DIMMs in the
DIMM 1 (black) sockets of channels A and B (see Figure 15).

Intel Desktop Board DH55HC Product Guide

Figure 15. Example Dual Channel Memory Configuration with Four DIMMs

Three DIMMs
If you want to use three DIMMs in a dual-channel configuration, install a matched pair
of DIMMs equal in speed and size in the DIMM 0 (blue) socket of channel A and the
DIMM 0 (blue) socket of channel B. Install the third DIMM in the DIMM 1 (black)
socket of either channel A or channel B (see Figure 16).

Figure 16. Example Dual Channel Memory Configuration with Three DIMMs

NOTE
All other memory configurations will result in single channel memory operation.

Installing and Replacing Desktop Board Components

Installing DIMMs
To make sure you have the correct DIMM, place it on the illustration of the DDR3
DIMM in Figure 17. All the notches should match with the DDR3 DIMM.

Figure 17. Use DDR3 DIMMs

Intel Desktop Board DH55HC Product Guide

To install a DIMM, follow these steps:
1. Observe the precautions in "Before You Begin" on page 27.
2. Turn off all peripheral devices connected to the computer. Turn off the computer
and disconnect the AC power cord.
3. Remove the computer’s cover and locate the DIMM sockets (see Figure 18).
4. If a full length PCI Express graphics card is installed in the PCI Express x16
connector, remove the card to gain full access to the DIMM sockets.

Figure 18. Installing a DIMM
5. Make sure the clips at either end of the DIMM socket(s) are pushed outward to the
open position.
6. Holding the DIMM by the edges, remove it from its anti-static package.
7. Position the DIMM above the socket. Align the small notch at the bottom edge of
the DIMM with the keys in the socket (see inset in Figure 18).
8. Insert the bottom edge of the DIMM into the socket.
9. When the DIMM is inserted, push down on the top edge of the DIMM until the
retaining clips snap into place. Make sure the clips are firmly in place.
10. Reinstall the PCI Express graphics card if one was removed in Step 4.
11. Replace the computer’s cover and reconnect the AC power cord.

Installing and Replacing Desktop Board Components

Removing DIMMs
To remove a DIMM, follow these steps:
1.
2.
3.
4.
5.
6.
7.
8.
9.

Observe the precautions in "Before You Begin" on page 27.
Turn off all peripheral devices connected to the computer. Turn off the computer.
Remove the AC power cord from the computer.
Remove the computer’s cover.
If a full length PCI Express graphics card is installed in the PCI Express x16
connector, remove the card to gain access to the DIMMs.
Gently spread the retaining clips at each end of the DIMM socket. The DIMM pops
out of the socket.
Hold the DIMM by the edges, lift it away from the socket, and store it in an
anti-static package.
Reinstall the PCI Express graphics card if one was removed in Step 5 and
reconnect any other parts you removed or disconnected to reach the DIMMs.
Replace the computer’s cover and reconnect the AC power cord.

Installing and Removing PCI Express x16
Graphics Cards
Installing a PCI Express x16 Graphics Card
CAUTION
Before installing a PCI Express x16 graphics card, make sure that the tabs on the
DIMM sockets are in the upright position (closed); otherwise, they may be damaged by
the PCI Express card during installation.

CAUTION
When installing a PCI Express card, ensure that the card is fully seated in the PCI
Express connector before you power on the system. If the card is not fully seated in
the connector, an electrical short may result across the connector pins. Depending on
the over-current protection of the power supply, certain Desktop Board components
and/or traces may be damaged.
Follow these instructions to install a PCI Express x16 graphics card:
1. Observe the precautions in "Before You Begin" on page 27.
2. Place the card in the PCI Express x16 connector (Figure 19, A) and press down on
the card until it is completely seated in the connector and the card retention notch
on the card snaps into place around the retention mechanism pin on the connector.
3. Secure the card’s metal bracket to the chassis back panel with a screw
(Figure 19, B).

Intel Desktop Board DH55HC Product Guide

4. Connect a monitor to the graphics card according to the manufacturer’s
instructions.

Figure 19. Installing a PCI Express x16 Graphics Card

Removing a PCI Express x16 Graphics Card
Follow these instructions to remove a PCI Express x16 graphics card from a connector:
1. Observe the precautions in "Before You Begin" on page 27.
2. Disconnect the monitor cable from the graphics card back panel connector.
3. Remove the screw (Figure 20, A) that secures the card’s metal bracket to the
chassis back panel.
4. Push the card ejector lever down using the tip of a pencil or similar tool
(Figure 20, B) in the notch. This will release the card from the connector (C).
5. Pull the card straight up to remove it.

Installing and Replacing Desktop Board Components

Figure 20. Removing a PCI Express x16 Graphics Card

Intel Desktop Board DH55HC Product Guide

Connecting Serial ATA (SATA) Cables
SATA cables support the Serial ATA protocol. Each cable can be used to connect one
internal SATA drive to the Desktop Board. For correct cable function:
1. Observe the precautions in “Before You Begin” on page 27.
2. Attach one end of the SATA cable to one of the SATA connectors on the board
(Figure 21, A) and attach the other end of the cable to the SATA drive
(Figure 21, B).

Figure 21. Connecting a Serial ATA Cable

Installing and Replacing Desktop Board Components

Installing an Intel® Z-U130 USB Solid-State
Drive (or Compatible Device)
An Intel Z-U130 USB Solid-State Drive (or compatible device) can be installed on the
Desktop Board by using the onboard USB 2.0 header indicated in Figure 1, Y. This
header provides support for the solid state drive.
To install an Intel Z-U130 USB Solid-State Drive (or compatible device) on the Desktop
Board, follow these steps:
1. Observe the precautions in "Before You Begin" on page 27.
2. Align the connector (Figure 22, A) on the bottom of the solid state drive with the
USB 2.0 header on the Desktop Board. The connectors are keyed and will mate
correctly when the solid state drive is oriented as shown in Figure 22.
3. Secure the solid state drive to the Desktop Board with the screw (Figure 22, B)
included with the board.

Figure 22. Installing an Intel Z-U130 USB Solid-State Drive
(or Compatible Device)
If not used with an Intel Z-U130 USB Solid-State Drive (or Compatible Device), this
USB header can be used as an additional dual-port front panel USB header.

Intel Desktop Board DH55HC Product Guide

Connecting to the Internal Headers
Before connecting cables to any of the internal headers, observe the precautions in
“Before You Begin” on page 27. Figure 23 shows the location of the internal headers
and connectors on Intel Desktop Board DH55HC.

Figure 23. Internal Headers

Installing and Replacing Desktop Board Components

Front Panel Audio Header
The front panel audio header shown in Figure 23, A supports both Intel High Definition
(HD) Audio and AC ’97 Audio.
Table 4 shows the pin assignments and signal names for HD Audio and Table 5 shows
the pin assignments and signal names for AC ’97 Audio.
Table 4. Front Panel Audio Signal Names for Intel HD Audio
Pin

Signal Name

PORT 1L (Microphone)

GND

PORT 1R (Microphone)

PRESENCE#

PORT 2R (Headphone)

SENSE1_RETURN

SENSE_SEND

KEY (no pin)

PORT 2L (Headphone)

SENSE2_RETURN

Table 5. Front Panel Audio Header Signal Names for AC ’97 Audio
Pin

Signal Name

MIC

AUD_GND

MIC_BIAS

AUD_GND

FP_OUT_R

FP_RETURN_R

AUD_5V

KEY (no pin)

FP_OUT_L

FP_RETURN_L

Internal Mono Speaker Header
The internal mono speaker header is shown in Figure 23, B. Table 6 shows the pin
assignments and signal names for the internal mono speaker header.
Table 6. Internal Mono Speaker Header
Pin

Signal Name

−

Intel Desktop Board DH55HC Product Guide

S/PDIF Header
Figure 23, C shows the location of the S/PDIF output header. Table 7 shows the pin
assignments and signal names for the S/PDIF output header.
Table 7. S/PDIF Header Signal Names
Pin

Description

Ground

S/PDIF Out

Key (no pin)

+5 VDC

Parallel Port Header
Figure 23, D shows the location of the parallel port header. Table 8 shows the pin
assignments and signal names for the parallel port header.
Table 8. Parallel Port Header

Standard Signal Name

ECP Signal Name

EPP Signal Name

STROBE#

WRITE#

AUTOFD#

AUTOFD#, HOSACK

DATASTB#

PD0

FAULT#

FAULT#, PERIPHREQST#

FAULT#

PD1

INT#

INT#, REVERSERQST#

RESET#

PD2

SLCTIN#

ADDRSTB#

PD3

GROUND

PD4

GROUND

PD5

GROUND

PD6

GROUND

PD7

GROUND

ACK#

INTR

GROUND

BUSY

BUSY#, PERIPHACK

WAIT#

GROUND

Installing and Replacing Desktop Board Components

Standard Signal Name

ECP Signal Name

EPP Signal Name

PERROR

PE, ACKREVERSE#

GROUND

SELECT

KEY (no pin)

Chassis Intrusion Header
Figure 23, E shows the location of the chassis intrusion header. This header can be
connected to a mechanical switch on the chassis to detect if the chassis cover is
removed. This switch should be in the open position when the chassis cover is
installed and closed when the cover is removed.
Table 9 shows the pin assignments and signal names for the chassis intrusion header.
Table 9. Chassis Intrusion Header Signal Names
Pin

Description

Intruder#

Ground

Intel® RPAT Header
Figure 23, F shows the location of the Intel RPAT header. Table 10 shows the pin
assignments and signal names for the Intel RPAT header.
Table 10. Intel RPAT Header Signal Names
Pin

Description

RPAT#

Ground

Alternate Front Panel Power LED Header
Figure 23, G shows the location of the alternate front panel power LED header. Pins 1
and 3 of this header duplicate the signals on pins 2 and 4 of the front panel header. If
your chassis has a three-pin power LED cable, connect it to this header. Table 11
shows the pin assignments for the alternate front panel header.
Table 11. Alternate Front Panel Power LED Header Signal Names
Pin

Signal Name

In/Out

Front panel LED+

Out

No pin

Front panel LED-

Out

Intel Desktop Board DH55HC Product Guide

Front Panel Header
Figure 23, H shows the location of the front panel header. Table 12 shows the pin
assignments and signal names for the front panel header.
Table 12. Front Panel Header Signal Names
Pin

Description

In/Out

Description

Hard Drive Activity LED

In/Out

Power LED

Hard disk LED pull-up to +5 V Out

Front panel LED+

Out

Hard disk active LED

Front panel LED-

Out

Ground

Power switch

Reset switch

Ground

Power

Out

No pin

Out

Reset Switch

On/Off Switch

Power

Not Connected

NOTE
When connecting individual wires from your chassis front panel to the front panel
header, be sure to observe the connection polarity. Positive wires are usually
solid color and negative wires are usually white or striped.

Front Panel USB 2.0 Headers
Figure 23, I shows the location of the standard front panel USB 2.0 header and
Table 13 shows its pin assignments and signal names.
Table 13. USB 2.0 Header Signal Names

Signal Name

Power (+5 V)

D-

D+

Ground

Key

No Connection

Installing and Replacing Desktop Board Components

Figure 23, J shows the location of the front panel USB 2.0 header (with Intel Z-U130
USB Solid-State Drive (or Compatible Device) Support) and Table 14 shows its pin
assignments and signal names.
Table 14. Front Panel USB Header (with Intel Z-U130 USB Solid-State Drive
(or Compatible Device) Support) Signal Names
Pin

Signal Name

+5 VDC

D-

D+

Ground

KEY (no pin)

LED#

NOTE
Computer systems that have an unshielded cable attached to a USB port might not
meet FCC Class B requirements, even if no device or a low-speed USB device is
attached to the cable. Use a shielded cable that meets the requirements for a
full-speed USB device.

Serial Header
Figure 23, K shows the location of the serial header. Table 15 shows the pin
assignments and signal names for the serial header.
Table 15. Serial Port Header
Pin

Signal Name

DCD (Data Carrier Detect)

RXD# (Receive Data)

TXD# (Transmit Data)

DTR (Data Terminal Ready)

Ground

DSR (Data Set Ready)

RTS (Request To Send)

CTS (Clear To Send)

RI (Ring Indicator)

Key (no pin)

Intel Desktop Board DH55HC Product Guide

Connecting to the Audio System
After installing the Realtek audio driver from the Intel® Express Installer DVD-ROM,
the multi-channel audio feature can be enabled. Figure 24 shows the back panel audio
connectors. The default connector assignments are shown in the table.

Item

Description

Line in

Line out (front speaker/headphones)

Mic in

Figure 24. Back Panel Audio Connectors

NOTE
The back panel line out connector is designed to power either headphones or amplified
speakers only. Poor audio quality may occur if passive (non-amplified) speakers are
connected to this output.

Installing and Replacing Desktop Board Components

Connecting Chassis Fan and Power Supply
Cables
Connecting Chassis Fan Cables
Connect chassis fan cables to the chassis fan headers on the Desktop Board.
Figure 25 shows the location of the chassis fan headers.

Figure 25. Location of the Chassis Fan Headers

Intel Desktop Board DH55HC Product Guide

Connecting Power Supply Cables
CAUTION
Failure to use an appropriate power supply and/or not connecting the 12 V power
connector (Figure 26, A) to the Desktop Board may result in damage to the board or
the system may not function properly.
Figure 26 shows the location of the power connectors. The 2 x 12 pin main power
connector (Figure 26, B) is backwards compatible with ATX12V power supplies with
2 x 10 connectors.

NOTE
If your power supply has a 2 x 10 main power connector, it is recommended that you
do not install a PCI Express x16 graphics card unless it has a direct connection to the
power supply.

Figure 26. Connecting Power Supply Cables
1. Observe the precautions in "Before You Begin" on page 27.
2. Connect the 12 V processor core voltage power supply cable to the 2 x 2 pin
connector (Figure 26, A).
3. Connect the main power supply cable to the 2 x 12 pin connector (Figure 26, B).

Installing and Replacing Desktop Board Components

Setting the BIOS Configuration Jumper
NOTE
Always turn off the power and unplug the power cord from the computer before
moving the jumper. Moving the jumper with the power on may result in unreliable
computer operation.
Figure 27 shows the location of the Desktop Board’s BIOS configuration jumper block.

Figure 27. Location of the BIOS Configuration Jumper Block

Intel Desktop Board DH55HC Product Guide

The three-pin BIOS jumper block enables board configuration to be done in the BIOS
Setup program. Table 16 shows the jumper settings for the BIOS Setup program
modes.
Table 16. Jumper Settings for the BIOS Setup Program Modes
Jumper Setting

Mode

Description

Normal (default) (1-2)

The BIOS uses the current configuration and
passwords for booting.

Configure (2-3)

After the Power-On Self-Test (POST) runs, the
BIOS displays the Maintenance Menu. Use this
menu to clear passwords.

Recovery (None)

The BIOS recovers data in the event of a failed
BIOS update.

Clearing Passwords
This procedure assumes that the board is installed in the computer and the
configuration jumper block is set to normal mode.
1. Observe the precautions in "Before You Begin" on page 27.
2. Turn off all peripheral devices connected to the computer. Turn off the computer.
Disconnect the computer’s power cord from the AC power source (wall outlet or
power adapter).
3. Remove the computer cover.
4. Find the configuration jumper block (see Figure 27).
5. Place the jumper on pins 2-3 as shown below.

6. Replace the cover, plug in the computer, turn on the computer, and allow it to
boot.
7. The computer starts the Setup program. Setup displays the Maintenance menu.

Installing and Replacing Desktop Board Components

8. Use the arrow keys to select Clear Passwords. Press and Setup displays a
pop-up screen requesting that you confirm clearing the password. Select Yes and
press . Setup displays the maintenance menu again.
9. Press to save the current values and exit Setup.
10. Turn off the computer. Disconnect the computer’s power cord from the AC power
source.
11. Remove the computer cover.
12. To restore normal operation, place the jumper on pins 1-2 as shown below.

13. Replace the cover, plug in the computer, and turn on the computer.

Replacing the Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at
25 ºC with 3.3 VSB applied.
When the voltage drops below a certain level, the BIOS Setup program settings stored
in CMOS RAM (for example, the date and time) might not be accurate. Replace the
battery with an equivalent one. Figure 28 on page 62 shows the location of the
battery.

PRÉCAUTION
Risque d'explosion si la pile usagée est remplacée par une pile de type incorrect. Les
piles usagées doivent être recyclées dans la mesure du possible. La mise au rebut des
piles usagées doit respecter les réglementations locales en vigueur en matière de
protection de l'environnement.

FORHOLDSREGEL
Eksplosionsfare, hvis batteriet erstattes med et batteri af en forkert type. Batterier
bør om muligt genbruges. Bortskaffelse af brugte batterier bør foregå i
overensstemmelse med gældende miljølovgivning.

Intel Desktop Board DH55HC Product Guide

OBS!
Det kan oppstå eksplosjonsfare hvis batteriet skiftes ut med feil type. Brukte batterier
bør kastes i henhold til gjeldende miljølovgivning.

VIKTIGT!
Risk för explosion om batteriet ersätts med felaktig batterityp. Batterier ska kasseras
enligt de lokala miljövårdsbestämmelserna.

VARO
Räjähdysvaara, jos pariston tyyppi on väärä. Paristot on kierrätettävä, jos se on
mahdollista. Käytetyt paristot on hävitettävä paikallisten ympäristömääräysten
mukaisesti.

VORSICHT
Bei falschem Einsetzen einer neuen Batterie besteht Explosionsgefahr. Die Batterie
darf nur durch denselben oder einen entsprechenden, vom Hersteller empfohlenen
Batterietyp ersetzt werden. Entsorgen Sie verbrauchte Batterien den Anweisungen
des Herstellers entsprechend.

AVVERTIMENTO
Esiste il pericolo di un esplosione se la pila non viene sostituita in modo corretto.
Utilizzare solo pile uguali o di tipo equivalente a quelle consigliate dal produttore. Per
disfarsi delle pile usate, seguire le istruzioni del produttore.

PRECAUCIÓN
Existe peligro de explosión si la pila no se cambia de forma adecuada. Utilice
solamente pilas iguales o del mismo tipo que las recomendadas por el fabricante del
equipo. Para deshacerse de las pilas usadas, siga igualmente las instrucciones del
fabricante.

WAARSCHUWING
Er bestaat ontploffingsgevaar als de batterij wordt vervangen door een onjuist type
batterij. Batterijen moeten zoveel mogelijk worden gerecycled. Houd u bij het
weggooien van gebruikte batterijen aan de plaatselijke milieuwetgeving.

ATENÇÃO
Haverá risco de explosão se a bateria for substituída por um tipo de bateria incorreto.
As baterias devem ser recicladas nos locais apropriados. A eliminação de baterias
usadas deve ser feita de acordo com as regulamentações ambientais da região.

Installing and Replacing Desktop Board Components

AŚCIAROŽZNAŚĆ
Існуе рызыка выбуху, калі заменены акумулятар неправільнага тыпу.
Акумулятары павінны, па магчымасці, перепрацоўвацца. Пазбаўляцца ад старых
акумулятараў патрэбна згодна з мясцовым заканадаўствам па экалогіі.

UPOZORNÌNÍ
V případě výměny baterie za nesprávný druh může dojít k výbuchu. Je-li to možné,
baterie by měly být recyklovány. Baterie je třeba zlikvidovat v souladu s místními
předpisy o životním prostředí.

Προσοχή
Υπάρχει κίνδυνος για έκρηξη σε περίπτωση που η μπαταρία αντικατασταθεί από μία
λανθασμένου τύπου. Οι μπαταρίες θα πρέπει να ανακυκλώνονται όταν κάτι τέτοιο είναι
δυνατό. Η απόρριψη των χρησιμοποιημένων μπαταριών πρέπει να γίνεται σύμφωνα με
τους κατά τόπο περιβαλλοντικούς κανονισμούς.

VIGYÁZAT
Ha a telepet nem a megfelelő típusú telepre cseréli, az felrobbanhat. A telepeket
lehetőség szerint újra kell hasznosítani. A használt telepeket a helyi környezetvédelmi
előírásoknak megfelelően kell kiselejtezni.

AWAS
Risiko letupan wujud jika bateri digantikan dengan jenis yang tidak betul. Bateri
sepatutnya dikitar semula jika boleh. Pelupusan bateri terpakai mestilah mematuhi
peraturan alam sekitar tempatan.

OSTRZEŻENIE
Istnieje niebezpieczeństwo wybuchu w przypadku zastosowania niewłaściwego typu
baterii. Zużyte baterie należy w miarę możliwości utylizować zgodnie z odpowiednimi
przepisami ochrony środowiska.

PRECAUŢIE
Risc de explozie, dacă bateria este înlocuită cu un tip de baterie necorespunzător.
Bateriile trebuie reciclate, dacă este posibil. Depozitarea bateriilor uzate trebuie să
respecte reglementările locale privind protecţia mediului.

Intel Desktop Board DH55HC Product Guide

ВНИМАНИЕ
При использовании батареи несоответствующего типа существует риск ее взрыва.
Батареи должны быть утилизированы по возможности. Утилизация батарей должна
проводится по правилам, соответствующим местным требованиям.

UPOZORNENIE
Ak batériu vymeníte za nesprávny typ, hrozí nebezpečenstvo jej výbuchu. Batérie by
sa mali podľa možnosti vždy recyklovať. Likvidácia použitých batérií sa musí vykonávať
v súlade s miestnymi predpismi na ochranu životného prostredia.

POZOR
Zamenjava baterije z baterijo drugačnega tipa lahko povzroči eksplozijo.
Če je mogoče, baterije reciklirajte. Rabljene baterije zavrzite v skladu z lokalnimi
okoljevarstvenimi predpisi.

.
UYARI
Yanlış türde pil takıldığında patlama riski vardır. Piller mümkün olduğunda geri
dönüştürülmelidir. Kullanılmış piller, yerel çevre yasalarına uygun olarak atılmalıdır.

OСТОРОГА
Використовуйте батареї правильного типу, інакше існуватиме ризик вибуху.
Якщо можливо, використані батареї слід утилізувати. Утилізація використаних
батарей має бути виконана згідно місцевих норм, що регулюють охорону довкілля.

Installing and Replacing Desktop Board Components

Intel Desktop Board DH55HC Product Guide

To replace the battery, follow these steps:
1. Observe the precautions in "Before You Begin" (see page 27).
2. Turn off all peripheral devices connected to the computer. Disconnect the
computer’s power cord from the AC power source (wall outlet or power adapter).
3. Remove the computer cover.
4. Locate the battery on the board (see Figure 28).
5. With a medium flat-bladed screwdriver, gently pry the battery free from its
connector. Note the orientation of the “+” and “-” on the battery.
6. Install the new battery in the connector, orienting the “+” and “-” correctly.
7. Replace the computer cover.

Figure 28. Removing the Battery

3 Updating the BIOS
The BIOS Setup program can be used to view and change the BIOS settings for the
computer. You can access the BIOS Setup program by pressing the key after
the Power-On Self-Test (POST) memory test begins and before the operating system
boot begins.
This chapter tells you how to update the BIOS by either using the Intel Express BIOS
Update utility or the Iflash Memory Update utility, and how to recover the BIOS if an
update fails.

Updating the BIOS with the Intel® Express
BIOS Update Utility
With the Intel Express BIOS Update utility you can update the system BIOS while in
the Windows environment. The BIOS file is included in an automated update utility
that combines the functionality of the Intel® Flash Memory Update Utility and the ease
of use of Windows-based installation wizards.
To update the BIOS with the Intel Express BIOS Update utility:
1. Go to the Intel World Wide Web site:
http://support.intel.com/support/motherboards/desktop/
2. Navigate to the DH55HC page, click “Latest BIOS and driver updates,” select “BIOS
Update [TCIBX10H.86A],” and download the Express BIOS Update utility file.
3. Download the file to your hard drive. (You can also save this file to a removable
USB device. This is useful if you are updating the BIOS for multiple identical
systems.)
4. Close all other applications. This step is required. Your system will be rebooted at
the last Express BIOS Update window.
5. Double-click the executable file from the location on your hard drive where it was
saved. This runs the update program.
6. Follow the instructions provided in the dialog boxes to complete the BIOS update.

Intel Desktop Board DH55HC Product Guide

Updating the BIOS with the ISO Image BIOS
Update File or the Iflash Memory Update
Utility
You can use the information in this section to update the BIOS using either the Iflash
Memory Update Utility or the ISO Image BIOS update file.

Obtaining the BIOS Update File
You can update to a new version of the BIOS by using the ISO Image BIOS update file
(recommended), or Iflash BIOS update file.
The ISO Image BIOS update file is a standardized image of a bootable CD-ROM that
can be used to create a bootable CD that will update the BIOS.
The Iflash BIOS update file is a compressed file that contains the files you need to
update the BIOS. The Iflash BIOS update file contains:
•
•
•

New BIOS file (including the Intel® Management Engine Firmware Image)
Intel® Integrator Toolkit Configuration File (optional)
Intel Flash Memory Update Utility

You can obtain either of these files through your computer supplier or by navigating to
the Intel Desktop Board DH55HC page on the Intel World Wide Web site at:
http://support.intel.com/support/motherboards/desktop
Navigate to the DH55HC page, click “Latest BIOS and driver updates,” select “BIOS
Update [TCIBX10H.86A],” and download the ISO Image BIOS Update or Iflash BIOS
Update utility file.

Updating the BIOS

Updating the BIOS with the ISO Image BIOS Update
File
The ISO Image BIOS update allows for the update of an Intel® Desktop Board BIOS to
the latest production release regardless of the operating system installed on the
computer's hard drive and without the need to remove the BIOS configuration jumper.
It requires a blank CD-R, a read/writeable CD drive, and software capable of
uncompressing and writing the ISO image file to CD.
The image is bootable and automatically launches a script to update the BIOS via the
Iflash utility.

CAUTION
Do not interrupt the process or the system may not function properly.
Follow these instructions to upgrade the BIOS using the ISO Image BIOS file:
1. Download the ISO Image BIOS file.
2. Using software capable of writing an ISO image file to CD, burn the data to a
blank CD.

NOTE
Copying the ISO Image BIOS file to CD will not work. The completed CD should
contain multiple files and a directory.
3. Insert the CD that was created in the CD-ROM drive of the computer to be
upgraded and boot the system.
4. When the "Press ENTER to continue booting from CD-ROM" prompt appears, press
the Enter key. The system will boot from the hard drive if no key is pressed within
15 seconds.
5. At the "Welcome to the Intel Desktop Board BIOS Upgrade CD-ROM" page, press
any key to confirm the BIOS upgrade operation.
6. Wait for the BIOS upgrade process to complete.

CAUTION
DO NOT POWER DOWN YOUR COMPUTER before the update is complete. The update
may take up to 5 minutes.

Intel Desktop Board DH55HC Product Guide

Updating the BIOS with the Iflash Memory Update
Utility
With the Iflash Memory update utility you can update the system BIOS from a
bootable CD-ROM, bootable USB flash drive, or other bootable USB media. The utility
available on the Intel World Wide Web site provides a simple method for creating a
bootable CD-ROM that will automatically update your BIOS. The Iflash BIOS update
files can also be extracted locally to your hard drive and copied to a bootable USB
flash drive or other bootable USB media.
The Iflash Memory update utility allows you to update the BIOS and Intel Management
Engine in flash memory

NOTE
Review the instructions distributed with the update utility before attempting a BIOS
update.

CAUTION
Do not interrupt the process or the system may not function properly.
1. Uncompress the BIOS update file and copy the .BIO file, IFLASH.EXE, and .ITK file
(optional) to a bootable USB flash drive or other bootable USB media.
2. Configure the BIOS or use the F10 option during POST to boot to the USB device.
3. Manually run the IFLASH.EXE file from the USB device and manually update the
BIOS.

Recovering the BIOS
It is unlikely that anything will interrupt the BIOS update; however, if an interruption
occurs, the BIOS could be damaged. Due to BIOS size and recovery requirements, a
CD-R with the .BIO file in the root directory will be required.
For more information about updating the Intel Desktop Board BIOS or recovering from
a BIOS update failure, go to
http://support.intel.com/support/motherboards/desktop/sb/CS-022312.htm

A Error Messages and Indicators
Intel Desktop Board DH55HC reports POST errors in two ways:
•
•

By sounding a beep code and blinking the front panel power LED
By displaying an error message on the monitor

BIOS Error Codes
Whenever a recoverable error occurs during POST, the BIOS causes the board’s
speaker to beep and the front panel power LED to blink an error message indicating
the problem (see Table 17).
Table 17. BIOS Beep Codes
Type

Pattern

Frequency/Comments

F2 Setup/F10 Boot
Menu Prompt

One 0.5 second beep when the BIOS is
ready to accept keyboard input

932 Hz

BIOS update in
progress

None

Video error (no addin graphics card
installed)

On-off (1.0 second each) two times, then a
2.5-second pause (off), the entire pattern
repeats (beeps and pause) once and the
BIOS will continue to boot.

Memory error

On-off (1.0 second each) three times, then 932 Hz
a 2.5-second pause (off), the entire pattern
repeats (beeps and pause) until the system
is powered off.

Thermal trip warning

Alternate high and low beeps (1.0 second
each) for eight beeps followed by system
shut down.

932 Hz
For processors requiring
an add-in graphics card

High beep 2000 Hz
Low beep 1500 Hz

Intel Desktop Board DH55HC Product Guide

Table 18. Front-panel Power LED Blink Codes
Type

Pattern

F2 Setup/F10 Boot
Menu Prompt

None

Note

BIOS update in
progress

Off when the update begins, then on for
0.5 seconds, then off for 0.5 seconds. The
pattern repeats until the BIOS update is
complete.

Video error (no addin graphics card
installed)

On-off (1.0 second each) two times, then a
2.5-second pause (off), the entire pattern
repeats (blink and pause) until the system
is powered off.

Memory error

On-off (1.0 second each) three times, then
a 2.5-second pause (off), the entire pattern
repeats (blinks and pause) until the system
is powered off.

Thermal trip warning

Each beep will be accompanied by the
following blink pattern: .25 seconds on,
.25 seconds off,
.25 seconds on, .25 seconds off. This
results in a total of 16 blinks.

For processors requiring
an add-in graphics card

BIOS Error Messages
When a recoverable error occurs during the POST, the BIOS displays an error message
describing the problem. Table 19 gives an explanation of the BIOS error messages.
Table 19. BIOS Error Messages

Error Message

Explanation

CMOS Battery Low

The battery may be losing power. Replace the battery
soon.

CMOS Checksum Bad

The CMOS checksum is incorrect. CMOS memory may
have been corrupted. Run Setup to reset values.

Memory Size Decreased

Memory size has decreased since the last boot. If no
memory was removed, then memory may be bad.

No Boot Device Available

System did not find a device to boot.

B Regulatory Compliance
This appendix contains the following regulatory compliance information for Intel
Desktop Board DH55HC:
•
•
•
•
•

Safety standards
European Union Declaration of Conformity statement
Product Ecology statements
Electromagnetic Compatibility (EMC) regulations
Product certifications

Safety Standards
Intel Desktop Board DH55HC complies with the safety standards stated in Table 20
when correctly installed in a compatible host system.
Table 20. Safety Standards
Regulation

Title

CSA/UL 60950-1, First
Edition

Information Technology Equipment – Safety - Part 1: General
Requirements (USA and Canada)

EN 60950-1:2006, Second
Edition

Information Technology Equipment – Safety - Part 1: General
Requirements (European Union)

IEC 60950-1:2005, Second
Edition

Information Technology Equipment – Safety - Part 1: General
Requirements (International)

Place Battery Marking
There is insufficient space on this Desktop Board to provide instructions for replacing
and disposing of the Lithium ion coin cell battery. For system safety certification, the
statement below or an equivalent statement is required to be permanently and legibly
marked on the chassis near the battery.

CAUTION
Risk of explosion if the battery is replaced with an incorrect type. Batteries should be
recycled where possible. Disposal of used batteries must be in accordance with local
environmental regulations.
A suitable caution label is included with Intel Desktop Board DH55HC.
For information about replacing the battery, go to page 57.

Intel Desktop Board DH55HC Product Guide

European Union Declaration of Conformity
Statement
We, Intel Corporation, declare under our sole responsibility that the product Intel®
Desktop Board DH55HC is in conformity with all applicable essential requirements
necessary for CE marking, following the provisions of the European Council Directives
2004/108/EC (EMC Directive) and 2006/95/EC (Low Voltage Directive).
The product is properly CE marked demonstrating this conformity and is for
distribution within all member states of the EU with no restrictions.

This product follows the provisions of the European Directives 2004/108/EC and
2006/95/EC.

Čeština Tento výrobek odpovídá požadavkům evropských směrnic 2004/108/EC a
2006/95/EC.
Dansk Dette produkt er i overensstemmelse med det europæiske direktiv
2004/108/EC & 2006/95/EC.
Dutch Dit product is in navolging van de bepalingen van Europees Directief
2004/108/EC & 2006/95/EC.
Eesti Antud toode vastab Euroopa direktiivides 2004/108/EC ja 2006/95/EC
kehtestatud nõuetele.
Suomi Tämä tuote noudattaa EU-direktiivin 2004/108/EC & 2006/95/EC määräyksiä.
Français Ce produit est conforme aux exigences de la Directive Européenne
2004/108/EC & 2006/95/EC.
Deutsch Dieses Produkt entspricht den Bestimmungen der Europäischen Richtlinie
2004/108/EC & 2006/95/EC.
Ελληνικά Το παρόν προϊόν ακολουθεί τις διατάξεις των Ευρωπαϊκών Οδηγιών
2004/108/EC και 2006/95/EC.
Magyar E termék megfelel a 2004/108/EC és 2006/95/EC Európai Irányelv
előírásainak.
Icelandic Þessi vara stenst reglugerð Evrópska Efnahags Bandalagsins númer
2004/108/EC & 2006/95/EC.
Italiano Questo prodotto è conforme alla Direttiva Europea 2004/108/EC &
2006/95/EC.
Latviešu Šis produkts atbilst Eiropas Direktīvu 2004/108/EC un 2006/95/EC
noteikumiem.

Regulatory Compliance

Lietuvių Šis produktas atitinka Europos direktyvų 2004/108/EC ir 2006/95/EC
nuostatas.
Malti Dan il-prodott hu konformi mal-provvedimenti tad-Direttivi Ewropej
2004/108/EC u 2006/95/EC.
Norsk Dette produktet er i henhold til bestemmelsene i det europeiske direktivet
2004/108/EC & 2006/95/EC.
Polski Niniejszy produkt jest zgodny z postanowieniami Dyrektyw Unii Europejskiej
2004/108/EC i 2006/95/EC.
Portuguese Este produto cumpre com as normas da Diretiva Européia 2004/108/EC
& 2006/95/EC.
Español Este producto cumple con las normas del Directivo Europeo 2004/108/EC &
2006/95/EC.
Slovensky Tento produkt je v súlade s ustanoveniami európskych direktív
2004/108/EC a 2006/95/EC.
Slovenščina Izdelek je skladen z določbami evropskih direktiv 2004/108/EC in
2006/95/EC.
Svenska Denna produkt har tillverkats i enlighet med EG-direktiv 2004/108/EC &
2006/95/EC.
Türkçe Bu ürün, Avrupa Birliği’nin 2004/108/EC ve 2006/95/EC yönergelerine uyar.

Product Ecology Statements
The following information is provided to address worldwide product ecology concerns
and regulations.

Recycling Considerations
As part of its commitment to environmental responsibility, Intel has implemented the
Intel® Product Recycling Program to allow retail consumers of Intel’s branded products
to return used products to selected locations for proper recycling.
Please consult http://www.intel.com/intel/other/ehs/product_ecology
for the details of this program, including the scope of covered products, available
locations, shipping instructions, terms and conditions, etc.
中文
作为其对环境责任之承诺的部分，英特尔已实施 Intel Product Recycling Program （英特尔产品
回收计划），以允许英特尔品牌产品的零售消费者将使用过的产品退还至指定地点作恰当的重复使用
处理。
请参考http://www.intel.com/intel/other/ehs/product_ecology
了解此计划的详情，包括涉及产品之范围、回收地点、运送指导、条款和条件等。

Intel Desktop Board DH55HC Product Guide

Deutsch
Als Teil von Intels Engagement für den Umweltschutz hat das Unternehmen das Intel
Produkt-Recyclingprogramm implementiert, das Einzelhandelskunden von Intel
Markenprodukten ermöglicht, gebrauchte Produkte an ausgewählte Standorte für
ordnungsgemäßes Recycling zurückzugeben.
Details zu diesem Programm, einschließlich der darin eingeschlossenen Produkte,
verfügbaren Standorte, Versandanweisungen, Bedingungen usw., finden Sie auf der
http://www.intel.com/intel/other/ehs/product_ecology
Español
Como parte de su compromiso de responsabilidad medioambiental, Intel ha
implantado el programa de reciclaje de productos Intel, que permite que los
consumidores al detalle de los productos Intel devuelvan los productos usados en los
lugares seleccionados para su correspondiente reciclado.
Consulte la http://www.intel.com/intel/other/ehs/product_ecology
para ver los detalles del programa, que incluye los productos que abarca, los lugares
disponibles, instrucciones de envío, términos y condiciones, etc.
Français
Dans le cadre de son engagement pour la protection de l'environnement, Intel a mis
en œuvre le programme Intel Product Recycling Program (Programme de recyclage
des produits Intel) pour permettre aux consommateurs de produits Intel de recycler
les produits usés en les retournant à des adresses spécifiées.
Visitez la page Web http://www.intel.com/intel/other/ehs/product_ecology pour en
savoir plus sur ce programme, à savoir les produits concernés, les adresses
disponibles, les instructions d'expédition, les conditions générales, etc.
日本語
インテルでは、環境保護活動の一環として、使い終えたインテル ブランド製品を指定の場所へ返送していただき、リ
サイクルを適切に行えるよう、インテル製品リサイクル プログラムを発足させました。
対象製品、返送先、返送方法、ご利用規約など、このプログラムの詳細情報は、
http://www.intel.com/intel/other/ehs/product_ecology （英語）をご覧ください。
Malay
Sebagai sebahagian daripada komitmennya terhadap tanggungjawab persekitaran,
Intel telah melaksanakan Program Kitar Semula Produk untuk membenarkan
pengguna-pengguna runcit produk jenama Intel memulangkan produk terguna ke
lokasi-lokasi terpilih untuk dikitarkan semula dengan betul.
Sila rujuk http://www.intel.com/intel/other/ehs/product_ecology untuk mendapatkan
butir-butir program ini, termasuklah skop produk yang dirangkumi, lokasi-lokasi
tersedia, arahan penghantaran, terma & syarat, dsb.

Regulatory Compliance

Portuguese
Como parte deste compromisso com o respeito ao ambiente, a Intel implementou o
Programa de Reciclagem de Produtos para que os consumidores finais possam enviar
produtos Intel usados para locais selecionados, onde esses produtos são reciclados de
maneira adequada.
Consulte o site http://www.intel.com/intel/other/ehs/product_ecology (em Inglês) para
obter os detalhes sobre este programa, inclusive o escopo dos produtos cobertos, os
locais disponíveis, as instruções de envio, os termos e condições, etc.
Russian
В качестве части своих обязательств к окружающей среде, в Intel создана
программа утилизации продукции Intel (Product Recycling Program) для
предоставления конечным пользователям марок продукции Intel возможности
возврата используемой продукции в специализированные пункты для должной
утилизации.
Пожалуйста, обратитесь на веб-сайт
http://www.intel.com/intel/other/ehs/product_ecology за информацией об этой
программе, принимаемых продуктах, местах приема, инструкциях об отправке,
положениях и условиях и т.д.
Türkçe
Intel, çevre sorumluluğuna bağımlılığının bir parçası olarak, perakende tüketicilerin
Intel markalı kullanılmış ürünlerini belirlenmiş merkezlere iade edip uygun şekilde geri
dönüştürmesini amaçlayan Intel Ürünleri Geri Dönüşüm Programı’nı uygulamaya
koymuştur.
Bu programın ürün kapsamı, ürün iade merkezleri, nakliye talimatları, kayıtlar ve
şartlar v.s dahil bütün ayrıntılarını ögrenmek için lütfen
http://www.intel.com/intel/other/ehs/product_ecology web sayfasına gidin.

Intel Desktop Board DH55HC Product Guide

Lead-free 2LI/Pb-free 2LI Board
The electronics industry is transitioning to European Union (EU) Restriction of
Hazardous Substances (RoHS)-compliant products. The RoHS legislation restricts the
use of six materials. One of these restricted materials is lead. Lead is the most
common and problematic of the RoHS restricted materials.
There are exemptions in RoHS that allow the use of lead in some very limited locations
in electronic products. Maximum lead concentration values have been established for
RoHS-compliant electronic products that allow up to 1000 ppm of lead.
Lead-free/Pb-free is a nickname that is often used (or misused) for RoHS-compliant
products. In this case, the term "Lead-free/Pb-free" means that lead has been
removed where required by the RoHS legislation but still may exist as an impurity
below 1000 ppm.
The term "Lead-free 2LI/Pb-free 2LI" means lead-free second level interconnect (2LI).
The balls, leads, or pads used to connect the component to a printed circuit board are
lead-free, but the first level interconnect (FLI) is not lead-free. The use of lead in the
FLI is acceptable because of the RoHS "flip chip" or "die bump" interconnect
exemption.
Intel Desktop Board DH55HC is a lead-free second level interconnect product.
Table 21 shows the lead-free second level interconnect marks as they appear on the
board and accompanying collateral. These marks are based on JEDEC standard
J-STD-609, “Marking and Labeling of Components, PCBs and PCBAs to Identify Lead,
Lead Free and Other Attributes.”
For more information concerning Intel’s lead-free initiatives, refer to:
http://www.intel.com/technology/silicon/leadfree.htm.

Regulatory Compliance

Table 21. Lead-Free Second Level Interconnect Marks
Description

Mark

This symbol is used to identify
electrical and electronic
assemblies and components in
which the Pb concentration
level in the Desktop Board
substrate and the solder
connections from the board to
the components (second-level
interconnect) is not greater
than 0.1% by weight
(1000 ppm).

Restriction of Hazardous Substances (RoHS)
EU RoHS
EU RoHS Directive 2002/95/EC restricts the use of the following six materials in
various types of electronic and electrical equipment:
•
•
•
•
•
•

Lead
Mercury
Cadmium
Hexavalent chromium
Polybrominated biphenyls (PBB)
Polybrominated diphenyl ether (PBDE)

The maximum concentrations allowed are 0.1% or 1000 ppm (except for cadmium,
which is limited to 0.01% or 100 ppm) by weight of homogeneous material.
Intel Desktop Board DH55HC complies with these restrictions.

Intel Desktop Board DH55HC Product Guide

China RoHS
“China RoHS” is the term used by industry generally to describe legislation
implemented by the Ministry of Information Industry (MII) in the People's Republic of
China for the control of pollution by electronic information products (EIP). The official
title of the China RoHS regulation is “Management Methods for Controlling Pollution by
Electronic Information Products.”
China RoHS bans the same substances and has the same limits as EU RoHS.
However, the China RoHS regulation requires specific product marking and a selfdeclaration of the controlled substances contained in each product.
Intel Desktop Board DH55HC is a China RoHS-compliant product.
The required China RoHS mark indicates the product’s Environmental Friendly Usage
Period (EFUP). The EFUP is defined as the number of years for which listed controlled
substances will not leak or chemically deteriorate while in the product. The EFUP for
Intel Desktop Boards has been determined to be 10 years.
The EFUP for Intel Desktop Board DH55HC is shown in Table 22.
Table 22. China RoHS Environmentally Friendly Use Period Mark
Description
This is an example of the
symbol used on Intel Desktop
Boards and associated
collateral. The color of the
mark may vary depending
upon the application. The
Environmental Friendly Usage
Period (EFUP) for Intel
Desktop Boards has been
determined to be 10 years.

Mark

Regulatory Compliance

The China MII stipulates that a material Self Declaration Table (SDT) must be included
in a product’s user documentation. The SDT for Intel Desktop Board DH55HC is shown
in Figure 29.

Figure 29. Intel Desktop Board DH55HC China RoHS Material
Self Declaration Table

Intel Desktop Board DH55HC Product Guide

EMC Regulations
Intel Desktop Board DH55HC complies with the EMC regulations stated in Table 23
when correctly installed in a compatible host system.
Table 23. EMC Regulations
Regulation (Class B)

Title

FCC 47 CFR Part 15,
Subpart B

Title 47 of the Code of Federal Regulations, Part 15, Subpart B,
Radio Frequency Devices. (USA)

ICES-003 Issue 4

Interference-Causing Equipment Standard, Digital Apparatus.
(Canada)

EN55022:2006

Limits and methods of measurement of Radio Interference
Characteristics of Information Technology Equipment. (European
Union)

EN55024:1998

Information Technology Equipment – Immunity Characteristics
Limits and methods of measurement. (European Union)

EN55022:2006

Australian Communications Authority, Standard for
Electromagnetic Compatibility. (Australia and New Zealand)

CISPR 22:2005
+A1:2005 +A2:2006

Limits and methods of measurement of Radio Disturbance
Characteristics of Information Technology Equipment.
(International)

CISPR 24:1997
+A1:2001 +A2:2002

Information Technology Equipment – Immunity Characteristics –
Limits and Methods of Measurement. (International)

VCCI V-3/2007.04,
V-4/2007.04

Voluntary Control for Interference by Information Technology
Equipment (Japan)

KN-22, KN-24

Korean Communications Commission – Framework Act on
Telecommunications and Radio Waves Act. (South Korea).

CNS 13438:2006

Bureau of Standards, Metrology and Inspection. (Taiwan)

Japanese Kanji statement translation: This is a Class B product based on the standard
of the Voluntary Control Council for Interference from Information Technology
Equipment (VCCI). If this is used near a radio or television receiver in a domestic
environment, it may cause radio interference. Install and use the equipment
according to the instruction manual.

Regulatory Compliance

Korean Class B statement translation: This is household equipment that is certified to
comply with EMC requirements. You may use this equipment in residential
environments and other non-residential environments.

Ensure Electromagnetic Compatibility (EMC)
Compliance
Before computer integration, make sure that the power supply and other modules or
peripherals, as applicable, have passed Class B EMC testing and are marked
accordingly.
Pay close attention to the following when reading the installation instructions for the
host chassis, power supply, and other modules:
•
•
•
•

Product certifications or lack of certifications
External I/O cable shielding and filtering
Mounting, grounding, and bonding requirements
Keying connectors when mating the wrong connectors could be hazardous

If the power supply and other modules or peripherals, as applicable, are not Class B
EMC compliant before integration, then EMC testing may be required on a
representative sample of the newly completed computer.

Intel Desktop Board DH55HC Product Guide

Product Certifications
Board-Level Certification Markings
Intel Desktop Board DH55HC has the product certification markings shown in Table 24.
Table 24. Product Certification Markings
Description

Mark

UL joint US/Canada Recognized Component mark. Includes adjacent
UL file number for Intel Desktop Boards: E210882.
FCC Declaration of Conformity logo mark for Class B equipment.
Includes Intel name and DH55HC model designation.

CE mark. Declaring compliance to European Union (EU) EMC
directive and Low Voltage directive.

Australian Communications Authority (ACA) and New Zealand Radio
Spectrum Management (NZ RSM) C-tick mark. Includes adjacent
Intel supplier code number, N-232.
Japan VCCI (Voluntary Control Council for Interference) mark.

S. Korea KCC (Korean Communications Commission) mark. Includes
adjacent KCC certification number: CPU-DH55HC (B).

Taiwan BSMI (Bureau of Standards, Metrology and Inspections)
mark. Includes adjacent Intel company number, D33025.
Printed wiring board manufacturer’s recognition mark. Consists of a
unique UL recognized manufacturer’s logo, along with a flammability
rating (solder side).

V-0

Regulatory Compliance

Chassis and Component Certifications
Ensure that the chassis and certain components; such as the power supply, peripheral
drives, wiring, and cables; are components certified for the country or market where
used. Agency certification marks on the product are proof of certification. Typical
product certifications include:
In Europe
The CE marking signifies compliance with all applicable European requirements. If the
chassis and other components are not properly CE marked, a supplier’s Declaration of
Conformity statement to the European EMC directive and Low Voltage directive (as
applicable), should be obtained. Additionally, other directives, such as the Radio and
Telecommunications Terminal Equipment (R&TTE) directive may also apply depending
on product features.
In the United States
A certification mark by a Nationally Recognized Testing Laboratory (NRTL) such as UL,
CSA, or ETL signifies compliance with safety requirements. Wiring and cables must
also be UL listed or recognized and suitable for the intended use. The FCC Class B
logo for home or office use signifies compliance with electromagnetic interference
(EMI) requirements.
In Canada
A nationally recognized certification mark such as CSA or cUL signifies compliance with
safety requirements. The Industry Canada statement at the front of this product guide
demonstrates compliance with Canadian EMC regulations.

Intel Desktop Board DH55HC Product Guide

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