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Dell OptiPlex 790
Setup And Features Information
About Warnings
WARNING: A WARNING indicates a potential for property damage, personal injury,
or death.

Mini-Tower — Front And Back View

Figure 1. Front And Back View Of Mini-Tower

1.
2.
3.
4.
5.
6.
7.
8.

power button, power light
optical-drive bay (optional)
headphone connector
microphone connector
diagnostic lights (4)
optical drive (optional)
optical-drive eject button
USB 2.0 connectors (4)

9.
10.
11.
12.
13.
14.
15.
16.

drive activity light
power supply diagnostic light
power supply diagnostic button
power connector
back panel connectors
expansion-card slots (4)
security-cable slot
padlock ring
Regulatory Model: D09M, D05D, D03S, D01U
Regulatory Type: D09M001, D05D001,
D03S001, D01U002
2011 – 02

Desktop — Front And Back View

Figure 2. Front And Back View Of Desktop

1.
2.
3.
4.
5.
6.
7.
8.

2

optical drive
optical-drive eject button
power button, power light
USB 2.0 connectors (4)
microphone connector
headphone connector
drive activity light
diagnostic lights (4)

9.
10.
11.
12.
13.
14.
15.

padlock ring
security-cable slot
power connector
back panel connectors
expansion-card slots (4)
power supply diagnostic light
power supply diagnostic button

Small Form Factor — Front And Back View

Figure 3. Front And Back View Of Small Form Factor

1.
2.
3.
4.
5.
6.
7.
8.

optical drive
optical-drive eject button
power button, power light
USB 2.0 connectors (4)
microphone connector
headphone connector
diagnostic lights (4)
drive activity light

9.
10.
11.
12.
13.
14.
15.

padlock ring
security-cable slot
power connector
power supply diagnostic button
power supply diagnostic light
back panel connectors
expansion-card slots (2)

3

Ultra Small Form Factor — Front And Back View

Figure 4. Front And Back View Of Ultra Small Form Factor

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.

4

optical drive
optical-drive eject button
power button, power light
drive activity light
diagnostic lights (4)
headphone connector
microphone connector
USB 2.0 connectors (2)
Wi-Fi antenna (optional)
network activity light
captive thumbscrew

12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.

padlock ring
security-cable slot
power connector
line-out connector
line-in/microphone connector
DisplayPort connector
VGA connector
serial connector
USB 2.0 connectors (5)
network connector
link integrity light

Mini-Tower And Desktop — Back Panel

Figure 5. Back Panel View of Mini-Tower And Desktop

1.
2.
3.
4.
5.
6.

mouse connector
link integrity light
network connector
network activity light
serial connector
line-out connector

7.
8.
9.
10.
11.

keyboard connector
USB 2.0 connectors (6)
DisplayPort connector
VGA connector
line-in/microphone connector

7.
8.
9.
10.
11.

keyboard connector
DisplayPort connector
VGA connector
USB 2.0 connectors (6)
line-in/microphone connector

Small Form Factor — Back Panel

Figure 6. Back Panel View Of Small Form Factor

1.
2.
3.
4.
5.
6.

mouse connector
serial connector
link integrity light
network connector
network activity light
line-out connector

5

Quick Setup
WARNING: Before you begin any of the procedures in this section, read the safety
information that shipped with your computer. For additional best practices
information, see www.dell.com/regulatory_compliance.
NOTE: Some devices may not be included if you did not order them.

1. Connect the monitor using only one of the following cables:

Figure 7. DVI Cable

Figure 8. DisplayPort Cable

Figure 9. VGA To DVI Adapter

Figure 10. DVI To DisplayPort Adapter

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Figure 11. VGA To DisplayPort Adapter

2. Connect the USB keyboard or mouse (optional).

Figure 12. USB Connection

3. Connect the network cable (optional).

Figure 13. Network Connection

4. Connect the modem (optional).

Figure 14. Modem Connection

5. Connect the power cable(s).

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Figure 15. Connecting Power

6. Press the power buttons on the monitor and the computer.

Figure 16. Turning On Power

Specifications

NOTE: The following specifications are only those required by law to ship with your
computer. For a complete and current listing of the specifications for your
computer, go to support.dell.com.
System Information
Chipset

Intel 6 Series Express Chipset

Processor
Processor

•
•
•
•

Intel Core i5, i7 Quad Core
Intel Core i3 Dual Core
Intel Pentium Dual Core
Intel Celeron Dual Core

Video
Type:
Integrated

• Intel HD Graphics
• Intel HD Graphics 2000

Discrete

PCI Express x16 graphics adapter

Integrated video memory

8

up to 1.7 GB shared video memory (Microsoft
Windows Vista and Windows 7)

Memory
Memory module connectors
Desktop, Mini-Tower, Small
Form Factor

four DIMM slots

Ultra Small Form Factor

two DIMM slots

Memory module capacity

1 GB, 2 GB, and 4 GB

Type

DDR3 1333 MHz

Minimum memory

1 GB

Maximum memory
Desktop, Mini-Tower, Small
Form Factor

16 GB

Ultra Small Form Factor

8 GB

Drives
Externally accessible:
5.25 inch drive bays
Mini-Tower

two

Desktop

one

Small Form Factor

one slim optical drive bay

Ultra Small Form Factor

one slim optical drive bay

Internally accessible:
3.5 inch SATA drive bays
Mini-Tower

two

Desktop

one

Small Form Factor

one

Ultra Small Form Factor

none

2.5 inch SATA drive bays
Mini-Tower

two

Desktop

one

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Drives
Small Form Factor

one

Ultra Small Form Factor

one

Control Lights And Diagnostic Lights
Power button light

Blue light — Solid blue light indicates power-on
state; blinking blue light indicates sleep state of
the computer.
Amber light — Solid amber light when the
computer does not start indicates a problem with
the system board or power supply. Blinking
amber light indicates a problem with the system
board.

Drive activity light

Blue light — Blinking blue light indicates that the
computer is reading data from or writing data to
the hard drive.

Diagnostic lights

Four lights located on the front panel of the
computer. For more information on the diagnostic
lights, see the Service Manual at
support.dell.com/manuals.

Power
Coin-cell battery

3 V CR2032 lithium coin cell

Voltage
Mini-Tower

100 VAC to 240 VAC, 50 Hz to 60 Hz, 5.00 A

Desktop

100 VAC to 240 VAC, 50 Hz to 60 Hz, 4.40 A

Small Form Factor

100 VAC to 240 VAC, 50 Hz to 60 Hz, 3.60 A
100 VAC to 240 VAC, 50 Hz to 60 Hz, 4.00 A

Ultra Small Form Factor

100 VAC to 240 VAC, 50 Hz to 60 Hz, 2.90 A

Wattage

10

Mini-Tower

265 W

Desktop

250 W

Power
Small Form Factor

240 W

Ultra Small Form Factor

200 W

Maximum heat dissipation
Mini-Tower

1390 BTU/hr

Desktop

1312 BTU/hr

Small Form Factor

1259 BTU/hr

Ultra Small Form Factor

758 BTU/hr

NOTE: Heat dissipation is calculated by using the power supply wattage rating.
NOTE: See the safety information that shipped with your computer for important
voltage-setting information.
Physical
Height
Mini-Tower

36.00 cm (14.17 inches)

Desktop

36.00 cm (14.17 inches)

Small Form Factor

29.00 cm (11.42 inches)

Ultra Small Form Factor

23.70 cm (9.33 inches)

Width
Mini-Tower

17.50 cm (6.89 inches)

Desktop

10.20 cm (4.01 inches)

Small Form Factor

9.26 cm (3.65 inches)

Ultra Small Form Factor

6.50 cm (2.56 inches)

Depth
Mini-Tower

41.70 cm (16.42 inches)

Desktop

41.00 cm (16.14 inches)

Small Form Factor

31.20 cm (12.28 inches)

Ultra Small Form Factor

24.00 cm (9.45 inches)

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Physical
Weight (Minimum)
Mini-Tower

8.87 kg (19.55 lb)

Desktop

7.56 kg (16.67 lb)

Small Form Factor

5.70 kg (12.57 lb)

Ultra Small Form Factor

3.27 kg (7.21 lb)

Environmental
Temperature:
Operating

10 °C to 35 °C (50 °F to 95 °F)

Storage

–40 °C to 65 °C (–40 °F to 149 °F)

Relative humidity

20% to 80% (noncondensing)

Altitude:
Operating

–15.20 m to 3048 m (–50 ft to 10,000 ft)

Storage

–15.20 m to 10,668 m (–50 ft to 35,000 ft)

Airborne contaminant level

G1 or lower as defined by ISA-S71.04–1985

Finding More Information and Resources
See the safety and regulatory documents that shipped with your computer
and the regulatory compliance website at www.dell.com/
regulatory_compliance for more information on:
• Safety best practices
• Regulatory certification
• Ergonomics
See www.dell.com for additional information on:
• Warranty
• Terms and Conditions (U.S. only)
• End User License Agreement
Information in this publication is subject to change without notice.
© 2011 Dell Inc. All rights reserved.
Reproduction of these materials in any manner whatsoever without the written permission of
Dell Inc. is strictly forbidden.

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Trademarks used in this text: Dell™, the DELL logo, Dell Precision™, Precision ON™,
ExpressCharge™, Latitude™, Latitude ON™, OptiPlex™, Vostro™, and Wi-Fi Catcher™ are
trademarks of Dell Inc. Intel®, Pentium®, Xeon®, Core™, Atom™, Centrino®, and Celeron® are
registered trademarks or trademarks of Intel Corporation in the U.S. and other countries. AMD®
is a registered trademark and AMD Opteron™, AMD Phenom™, AMD Sempron™,
AMD Athlon™, ATI Radeon™, and ATI FirePro™ are trademarks of Advanced Micro Devices,
Inc. Microsoft®, Windows®, MS-DOS®, Windows Vista®, the Windows Vista start button, and
Office Outlook® are either trademarks or registered trademarks of Microsoft Corporation in the
United States and/or other countries. Blu-ray Disc™ is a trademark owned by the Blu-ray Disc
Association (BDA) and licensed for use on discs and players. The Bluetooth® word mark is a
registered trademark and owned by the Bluetooth® SIG, Inc. and any use of such mark by Dell
Inc. is under license. Wi-Fi® is a registered trademark of Wireless Ethernet Compatibility
Alliance, Inc.
Other trademarks and trade names may be used in this publication to refer to either the entities
claiming the marks and names or their products, Dell Inc. disclaims any proprietary interest in
trademarks and trade names other than its own.

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