ASRocK B550M-C Motherboard User Manual

User Manual for ASRocK models including: B550M-C, Motherboard

B550M-C - ASRock

Disclaimer: Specifications and information contained in this documentation are furnished for informational use only and subject to change without notice, ...

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B550M-C

Version 1.0 Published September 2021 Copyright©2021 ASRock INC. All rights reserved.
Copyright Notice:
No part of this documentation may be reproduced, transcribed, transmitted, or translated in any language, in any form or by any means, except duplication of documentation by the purchaser for backup purpose, without written consent of ASRock Inc.
Products and corporate names appearing in this documentation may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners' benefit, without intent to infringe.
Disclaimer:
Specifications and information contained in this documentation are furnished for informational use only and subject to change without notice, and should not be constructed as a commitment by ASRock. ASRock assumes no responsibility for any errors or omissions that may appear in this documentation.
With respect to the contents of this documentation, ASRock does not provide warranty of any kind, either expressed or implied, including but not limited to the implied warranties or conditions of merchantability or fitness for a particular purpose.
In no event shall ASRock, its directors, officers, employees, or agents be liable for any indirect, special, incidental, or consequential damages (including damages for loss of profits, loss of business, loss of data, interruption of business and the like), even if ASRock has been advised of the possibility of such damages arising from any defect or error in the documentation or product.
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.
CALIFORNIA, USA ONLY
The Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance controlled in Perchlorate Best Management Practices (BMP) regulations passed by the California Legislature. When you discard the Lithium battery in California, USA, please follow the related regulations in advance. "Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/ perchlorate"
ASRock Website: http://www.asrock.com

AUSTRALIA ONLY
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage caused by our goods. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. If you require assistance please call ASRock Tel : +886-2-28965588 ext.123 (Standard International call charges apply)
The terms HDMI® and HDMI High-Definition Multimedia Interface, and the HDMI logo are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.

CE Warning
This device complies with directive 2014/53/EU issued by the Commision of the European Community. This equipment complies with EU radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
Operations in the 5.15-5.35GHz band are restricted to indoor usage only.

Radio transmit power per transceiver type

Function WiFi
Bluetooth

Frequency 2400-2483.5 MHz 5150-5250 MHz 5250-5350 MHz
5470-5725 MHz 2400-2483.5 MHz

Maximum Output Power (EIRP)
18.5 + / -1.5 dbm 21.5 + / -1.5 dbm 18.5 + / -1.5 dbm (no TPC) 21.5 + / -1.5 dbm (TPC) 25.5 + / -1.5 dbm (no TPC) 28.5 + / -1.5 dbm (TPC) 8.5 + / -1.5 dbm

Contents

Chapter 1 Introduction

1.1 Package Contents

1.2 Specifications

1.3 Motherboard Layout

1.4 I/O Panel

1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz

Antennas

Chapter 2 Installation

2.1 Installing the CPU

2.2 Installing the CPU Fan and Heatsink

2.3 Installing Memory Modules (DIMM)

2.4 Expansion Slots (PCI Express Slots)

2.5 Jumpers Setup

2.6 Onboard Headers and Connectors

2.7 Post Status Checker

2.8 CrossFireXTM and Quad CrossFireXTM Operation Guide

2.8.1 Installing Two CrossFireXTM-Ready Graphics Cards

2.8.2 Driver Installation and Setup

2.9 M.2_SSD (NGFF) Module Installation Guide (M2_1)

2.10 M.2_SSD (NGFF) Module Installation Guide (M2_2)

Chapter 3 Software and Utilities Operation

3.1 Installing Drivers

3.2 ASRock Motherboard Utility (A-Tuning)

3.2.1 Installing ASRock Motherboard Utility (A-Tuning)

3.2.2 Using ASRock Motherboard Utility (A-Tuning)

3.3 ASRock Live Update & APP Shop

3.3.1 UI Overview

3.3.2 Apps

3.3.3 BIOS & Drivers

3.3.4 Setting

3.4 ASRock Polychrome SYNC

Chapter 4 UEFI SETUP UTILITY

4.1 Introduction

4.1.1 UEFI Menu Bar

4.1.2 Navigation Keys

4.2 Main Screen

4.3 OC Tweaker Screen

4.4 Advanced Screen

4.4.1 CPU Configuration

4.4.2 Onboard Devices Configuration

4.4.3 Storage Configuration

4.4.4 ACPI Configuration

4.4.5 Trusted Computing

4.4.6 AMD CBS

4.4.7 AMD PBS

4.4.8 AMD Overclocking

4.5 Tools

4.6 Hardware Health Event Monitoring Screen

4.7 Security Screen

4.8 Boot Screen

4.9 Exit Screen

B550M-C
Chapter 1 Introduction
Thank you for purchasing ASRock B550M-C motherboard, a reliable motherboard produced under ASRock's consistently stringent quality control. It delivers excellent performance with robust design conforming to ASRock's commitment to quality and endurance. In this documentation, Chapter 1 and 2 contains the introduction of the motherboard and step-by-step installation guides. Chapter 3 contains the operation guide of the software and utilities. Chapter 4 contains the configuration guide of the BIOS setup.
Because the motherboard specifications and the BIOS software might be updated, the content of this documentation will be subject to change without notice. In case any modifications of this documentation occur, the updated version will be available on ASRock's website without further notice. If you require technical support related to this motherboard, please visit our website for specific information about the model you are using. You may find the latest VGA cards and CPU support list on ASRock's website as well. ASRock website http://www.asrock.com.
1.1 Package Contents
· ASRock B550M-C Motherboard (Micro ATX Form Factor) · 1 x I/O Panel Shield · 2 x Serial ATA (SATA) Data Cables (Optional) · 2 x ASRock WiFi 2.4/5 GHz Antennas (Optional) · 2 x Screws for M.2 Sockets (Optional)
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1.2 Specifications

Platform

· Micro ATX Form Factor · Solid Capacitor design · 2oz Copper PCB

CPU

· Supports AMD AM4 Socket RyzenTM 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors*
* Not compatible with AMD AthlonTM Processors. · Digi Power design · 8 Power Phase design

Chipset

· AMD B550

Memory

· Dual Channel DDR4 Memory Technology · 4 x DDR4 DIMM Slots · AMD Ryzen series CPUs (Vermeer) support DDR4
4533+(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/ 4200(OC)/4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733 (OC)/3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC & non-ECC, un-buffered memory* · AMD Ryzen series CPUs (Matisse) support DDR4 4533+(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/ 4200(OC)/4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733 (OC)/3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC & non-ECC, un-buffered memory* · AMD Ryzen series APUs (Cezanne) support DDR4 4733+(OC)/4666(OC)/4600(OC)/4533(OC)/4466(OC)/ 4400(OC)/4333(OC)/4266(OC)/4200(OC)/4133(OC)/ 4000(OC)/3866(OC)/3800(OC)/3733(OC)/3600(OC)/ 3466(OC)/3200/2933/2667/2400/2133 ECC & non-ECC, unbuffered memory* · AMD Ryzen series APUs (Renoir) support DDR4 4733+(OC )/4666(OC)/4600(OC)/4533(OC)/4466(OC)/4400(OC) /4333(OC)/4266(OC)/4200(OC)/4133(OC)/4000(OC)/ 3866(OC)/3800(OC)/3733(OC)/3600(OC)/3466(OC)/ 3200/2933/2667/2400/2133 ECC & non-ECC, un-buffered memory*

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B550M-C

· AMD Ryzen series APUs (Picasso) support DDR4 3333+(OC)/3200(OC)/2933/2667/2400/2133 non-ECC, unbuffered memory*
* For Ryzen Series APUs (Picasso, Cezanne and Renoir), ECC is only supported with PRO CPUs. * Please refer to Memory Support List on ASRock's website for more information. (http://www.asrock.com/) * Please refer to page 23 for AMD non-XMP memory frequency support. For more details, please refer to the QVL on ASRock's website. · Max. capacity of system memory: 128GB · Supports Extreme Memory Profile (XMP) memory modules · 15 Gold Contact in DIMM Slots

Expansion Slot

AMD Ryzen series CPUs (Vermeer and Matisse) · 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE4:
Gen3 x4 mode)* AMD Ryzen series APUs (Cezanne and Renoir) · 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE4:
Gen3 x4 mode)* AMD Ryzen series APUs (Picasso) · 2 x PCI Express x16 Slots (PCIE1: Gen3x8 mode; PCIE4:
Gen3 x4 mode)*

* Supports NVMe SSD as boot disks · 2 x PCI Express 3.0 x16 Slots (PCIE2/PCIE3: x1 mode) · Supports AMD Quad CrossFireXTM and CrossFireXTM · 1 x Vertical M.2 Socket (Key E) with the bundled WiFi-
802.11ac module (on the rear I/O)

Graphics

· Integrated AMD RadeonTM Vega Series Graphics in Ryzen Series APU*
* Actual support may vary by CPU · DirectX 12, Pixel Shader 5.0 · Shared memory default 2GB. Max Shared memory supports
up to 16GB. * The Max shared memory 16GB requires 32GB system memory installed. · Supports HDMI 2.1 with max. resolution up to 4K x 2K
(4096x2160) @ 60Hz

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· Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 2.1 Port (Compliant
HDMI monitor is required) · Supports HDR (High Dynamic Range) with HDMI 2.1 · Supports HDCP 2.3 with HDMI 2.1 Port * Picasso supports HDCP 2.2 with HDMI 2.0 Port · Supports 4K Ultra HD (UHD) playback with HDMI 2.1
Port · Supports Microsoft PlayReady®

Audio

· 7.1 CH HD Audio (Realtek ALC897 Audio Codec) · Supports Surge Protection

LAN

· PCIE x1 Gigabit LAN 10/100/1000 Mb/s · Realtek RTL8111H · Supports Wake-On-LAN · Supports Lightning/ESD Protection · Supports Energy Efficient Ethernet 802.3az · Supports PXE

Wireless LAN

· Intel® 802.11ac WiFi Module · Supports IEEE 802.11a/b/g/n/ac · Supports Dual-Band (2.4/5 GHz) · Supports high speed wireless connections up to 433Mbps · Supports Bluetooth 4.2+ High speed class II

Rear Panel I/O

· 2 x Antenna Ports · 1 x PS/2 Mouse/Keyboard Port · 1 x HDMI Port · 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD
Protection) · 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD
Protection) · 4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports
ESD Protection) · 2 x USB 2.0 Ports (Supports ESD Protection) · 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
LED) · HD Audio Jacks: Line in / Front Speaker / Microphone

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B550M-C

Storage

· 6 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug*
* M2_2 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled. · 1 x Hyper M.2 Socket (M2_1), supports M Key type 2280
M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Vermeer, Matisse) or Gen3x4 (32 Gb/s) (with Cezanne, Renoir and Picasso)** · 1 x M.2 Socket (M2_2), supports M Key type 2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)** ** Supports NVMe SSD as boot disks ** Supports ASRock U.2 Kit

Connector

· 1 x SPI TPM Header · 1 x Power LED and Speaker Header · 2 x RGB LED Headers * Support in total up to 12V/3A, 36W LED Strip · 2 x Addressable LED Headers * Support in total up to 5V/3A, 15W LED Strip · 1 x CPU Fan Connector (4-pin) * The CPU Fan Connector supports the CPU fan of maximum
1A (12W) fan power. · 3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart
Fan Speed Control)
* The Chassis/Water Pump Fan supports the water cooler fan
of maximum 2A (24W) fan power.
* CHA_FAN1/WP, CHA_FAN2/WP and CHA_FAN3/WP can
auto detect if 3-pin or 4-pin fan is in use. · 1 x 24 pin ATX Power Connector · 1 x 8 pin 12V Power Connector · 1 x Front Panel Audio Connector · 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports
ESD Protection) · 2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
(Supports ESD Protection)

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BIOS Feature

· AMI UEFI Legal BIOS with GUI support · Supports "Plug and Play" · ACPI 5.1 compliance wake up events · Supports jumperfree · SMBIOS 2.3 support · CPU, CPU VDDCR_SOC, DRAM, +1.8VSB Voltage Multi-
adjustment

Hardware Monitor

· Temperature Sensing: CPU, Chassis/Water Pump Fans · Fan Tachometer: CPU, Chassis/Water Pump Fans · Quiet Fan (Auto adjust chassis fan speed by CPU tempera-
ture): CPU, Chassis/Water Pump Fans · Fan Multi-Speed Control: CPU, Chassis/Water Pump Fans · Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU
VDDCR_SOC, DRAM, VPPM, +1.8V

· Microsoft® Windows® 10 64-bit / 11 64-bit

Certifications

· FCC, CE · ErP/EuP ready (ErP/EuP ready power supply is required) · CEC Tier II ready

* For detailed product information, please visit our website: http://www.asrock.com

Please realize that there is a certain risk involved with overclocking, including adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using third-party overclocking tools. Overclocking may affect your system's stability, or even cause damage to the components and devices of your system. It should be done at your own risk and expense. We are not responsible for possible damage caused by overclocking.

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1.3 Motherboard Layout

B550M-C

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No. Description 1 8 pin 12V Power Connector (ATX12V1) 2 CPU Fan Connector (CPU_FAN1) 3 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1) 4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2) 5 RGB LED Header (RGB_LED1) 6 Addressable LED Header (ADDR_LED1) 7 ATX Power Connector (ATXPWR1) 8 USB 3.2 Gen1 Header (F_USB3_1_2) 9 SATA3 Connector (SATA3_2) 10 SATA3 Connector (SATA3_1) 11 SATA3 Connector (SATA3_4) (Upper), SATA3 Connector (SATA3_3) (Lower) 12 SATA3 Connector (SATA3_6) (Upper), SATA3 Connector (SATA3_5) (Lower) 13 System Panel Header (PANEL1) 14 Power LED and Speaker Header (SPK_PLED1) 15 USB 3.2 Gen1 Header (F_USB3_3_4) 16 Chassis/Water Pump Fan Connector (CHA_FAN3/WP) 17 Post Status Checker (PSC) 18 SPI TPM Header (SPI_TPM_J1) 19 USB 2.0 Header (USB_3_4) 20 USB 2.0 Header (USB_5_6) 21 Clear CMOS Jumper (CLRCMOS1) 22 Chassis/Water Pump Fan Connector (CHA_FAN1/WP) 23 Chassis/Water Pump Fan Connector (CHA_FAN2/WP) 24 Addressable LED Header (ADDR_LED2) 25 RGB LED Header (RGB_LED2) 26 Front Panel Audio Header (HD_AUDIO1)
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1.4 I/O Panel

B550M-C
3 4

No. Description 1 USB 2.0 Ports (USB12) 2 LAN RJ-45 Port* 3 Line In (Light Blue)** 4 Front Speaker (Lime)** 5 Microphone (Pink)** 6 USB 3.2 Gen2 Type-A Port
(USB31_TA_1)

No. Description 7 USB 3.2 Gen2 Type-C Port
(USB31_TC_1) 8 Antenna Ports 9 USB 3.2 Gen1 Ports (USB3_34) 10 USB 3.2 Gen1 Ports (USB3_12) 11 PS/2 Mouse/Keyboard Port 12 HDMI Port

* There are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications. ACT/LINK LED SPEED LED

LAN Port

Activity / Link LED

Status
Off Blinking On

Description
No Link Data Activity Link

Speed LED
Status Off Orange Green

Description
10Mbps connection 100Mbps connection 1Gbps connection

** Function of the Audio Ports in 7.1-channel Configuration:

Port
Light Blue (Rear panel) Lime (Rear panel) Pink (Rear panel) Lime (Front panel)

Function
Rear Speaker Out Front Speaker Out Central /Subwoofer Speaker Out Side Speaker Out
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1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz Antennas
WiFi-802.11ac + BT Module
This motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ac + BT v4.2 module (pre-installed on the rear I/O panel) that offers support for WiFi 802.11 a/b/ g/n/ac connectivity standards and Bluetooth v4.2. WiFi + BT module is an easy-touse wireless local area network (WLAN) adapter to support WiFi + BT. Bluetooth v4.2 standard features Smart Ready technology that adds a whole new class of functionality into the mobile devices. BT 4.2 also includes Low Energy Technology and ensures extraordinary low power consumption for PCs. * The transmission speed may vary according to the environment.
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B550M-C WiFi Antennas Installation Guide
Step 1 Prepare the WiFi 2.4/5 GHz Antennas that come with the package. Step 2 Connect the two WiFi 2.4/5 GHz Antennas to the antenna connectors. Turn the antenna clockwise until it is securely connected.
Step 3 Set the WiFi 2.4/5 GHz Antenna as shown in the illustration. *You may need to adjust the direction of the antenna for a stronger signal.
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Chapter 2 Installation
This is a Micro ATX form factor motherboard. Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits into it.
Pre-installation Precautions
Take note of the following precautions before you install motherboard components or change any motherboard settings. · Make sure to unplug the power cord before installing or removing the motherboard.
Failure to do so may cause physical injuries to you and damages to motherboard components. · In order to avoid damage from static electricity to the motherboard's components, NEVER place your motherboard directly on a carpet. Also remember to use a grounded wrist strap or touch a safety grounded object before you handle the components. · Hold components by the edges and do not touch the ICs. · Whenever you uninstall any components, place them on a grounded anti-static pad or in the bag that comes with the components. · When placing screws to secure the motherboard to the chassis, please do not overtighten the screws! Doing so may damage the motherboard.
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2.1 Installing the CPU
Unplug all power cables before installing the CPU.
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2.2 Installing the CPU Fan and Heatsink
After you install the CPU into this motherboard, it is necessary to install a larger heatsink and cooling fan to dissipate heat. You also need to spray thermal grease between the CPU and the heatsink to improve heat dissipation. Make sure that the CPU and the heatsink are securely fastened and in good contact with each other.
Please turn off the power or remove the power cord before changing a CPU or heatsink.
Installing the CPU Box Cooler SR1
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2
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CPU_FAN1

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Installing the AM4 Box Cooler SR2
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3 18

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B550M-C 4
CPU_FAN1
*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard.
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Installing the AM4 Box Cooler SR3
1
2 20

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B550M-C 3
4
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CPU_FAN1

+12V

RGB_LED2

*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard.

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B550M-C

2.3 Installing Memory Modules (DIMM)
This motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots, and supports Dual Channel Memory Technology.

1. For dual channel configuration, you always need to install identical (the same brand, speed, size and chip-type) DDR4 DIMM pairs.
2. It is unable to activate Dual Channel Memory Technology with only one or three memory module installed.
3. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4 slot; otherwise, this motherboard and DIMM may be damaged.
4. We suggest that you install the memory modules on DDR4_A2 and DDR4_B2 first for better DRAM compatibility on 2 DIMMs configuration.

AMD non-XMP Memory Frequency Support

Ryzen Series CPUs (Vermeer):

UDIMM Memory Slot

Frequency (Mhz)

3200

2933

SR/DR DR SR/DR DR

2667

SR/DR SR/DR SR/DR SR/DR 2667

Ryzen Series CPUs (Matisse):

UDIMM Memory Slot

Frequency (Mhz)

3200

2933

SR/DR DR SR/DR DR

2667

SR/DR SR/DR SR/DR SR/DR

2667

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Ryzen Series APUs (Cezanne):

UDIMM Memory Slot

Frequency (Mhz)
3200 3200

SR/DR DR SR/DR DR

SR/DR SR/DR SR/DR SR/DR

3200 3200 2933 2667 2667

Ryzen Series APUs (Renoir):

UDIMM Memory Slot

Frequency (Mhz)

3200

2933

SR/DR DR SR/DR DR

2667

SR/DR SR/DR SR/DR SR/DR

2667

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Ryzen Series APUs (Picasso):

UDIMM Memory Slot

Frequency (Mhz)

2933

2667

2400

2133

SR/DR DR SR/DR DR

1866

SR/DR SR/DR SR/DR SR/DR 1866

SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label

B550M-C

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The DIMM only fits in one correct orientation. It will cause permanent damage to the motherboard and the DIMM if you force the DIMM into the slot at incorrect orientation.
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2.4 Expansion Slots (PCI Express Slots)
There are 4 PCI Express slots on the motherboard.
Before installing an expansion card, please make sure that the power supply is switched off or the power cord is unplugged. Please read the documentation of the expansion card and make necessary hardware settings for the card before you start the installation.

PCIe slots:
PCIE1 (PCIe 4.0 x16 slot) is used for PCI Express x16 lane width graphics cards. PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x1 lane width cards. PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x1 lane width cards. PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.

PCIe Slot Configurations Ryzen series CPUs (Vermeer and Matisse):
PCIE1

Single Graphics Card

Gen4x16

PCIE4 N/A

Two Graphics Cards in CrossFireXTM Mode

Gen4x16

Gen3x4

Ryzen series APUs (Cezanne and Renoir): PCIE1

Single Graphics Card

Gen3x16

Two Graphics Cards in CrossFireXTM Mode

Gen3x16

PCIE4 N/A
Gen3x4

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Ryzen series APUs (Picasso):
Single Graphics Card Two Graphics Cards in
CrossFireXTM Mode

PCIE1 Gen3x8
Gen3x8

PCIE4 N/A
Gen3x4

For a better thermal environment, please connect a chassis fan to the motherboard's chassis fan connector (CHA_FAN1/WP, CHA_FAN2/WP or CHA_FAN3/WP ) when using multiple graphics cards.

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B550M-C
2.5 Jumpers Setup
The illustration shows how jumpers are setup. When the jumper cap is placed on the pins, the jumper is "Short". If no jumper cap is placed on the pins, the jumper is "Open".

Clear CMOS Jumper (see p.7, No. 21)

2-pin Jumper

Short: Clear CMOS Open: Default

CLRCMOS1 allows you to clear the data in CMOS. To clear and reset the system parameters to default setup, please turn off the computer and unplug the power cord from the power supply. After waiting for 15 seconds, use a jumper cap to short the pins on CLRCMOS1 for 5 seconds. However, please do not clear the CMOS right after you update the BIOS. If you need to clear the CMOS when you just finish updating the BIOS, you must boot up the system first, and then shut it down before you do the clear-CMOS action. Please be noted that the password, date, time, and user default profile will be cleared only if the CMOS battery is removed. Please remember to remove the jumper cap after clearing the CMOS.

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2.6 Onboard Headers and Connectors
Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage to the motherboard.

System Panel Header (9-pin PANEL1) (see p.7, No. 13)

PLED+ PLEDPWRBTN# GND
1 GND
RESET# GND HDLEDHDLED+

Connect the power button, reset button and system status indicator on the chassis to this header according to the pin assignments below. Note the positive and negative pins before connecting the cables.

PWRBTN (Power Switch): Connect to the power switch on the chassis front panel. You may configure the way to turn off your system using the power switch.
RESET (Reset Switch): Connect to the reset switch on the chassis front panel. Press the reset switch to restart the computer if the computer freezes and fails to perform a normal restart.
PLED (System Power LED): Connect to the power status indicator on the chassis front panel. The LED is on when the system is operating. The LED keeps blinking when the system is in S3 sleep state. The LED is off when the system is in S4 sleep state or powered off (S5).
HDLED (Hard Drive Activity LED): Connect to the hard drive activity LED on the chassis front panel. The LED is on when the hard drive is reading or writing data.
The front panel design may differ by chassis. A front panel module mainly consists of power switch, reset switch, power LED, hard drive activity LED, speaker and etc. When connecting your chassis front panel module to this header, make sure the wire assignments and the pin assignments are matched correctly.

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B550M-C

Power LED and Speaker Header (7-pin SPK_PLED1) (see p.7, No. 14)

SPEAKER DUMMY DUMMY +5V
1
PLED+ PLED+ PLED-

Please connect the chassis power LED and the chassis speaker to this header.

Serial ATA3 Connectors Right Angle: (SATA3_4: see p.7, No. 11) (Upper) (SATA3_3: see p.7, No. 11) (Lower) (SATA3_6: see p.7, No. 12) (Upper) (SATA3_5: see p.7, No. 12) (Lower) Vertical: (SATA3_1: see p.7, No. 10) (SATA3_2: see p.7, No. 9)

SATA3_6 SATA3_4 SATA3_5 SATA3_3

SATA3_1 SATA3_2

These six SATA3 connectors support SATA data cables for internal storage devices with up to 6.0 Gb/s data transfer rate. * M2_2 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled.

USB 2.0 Headers (9-pin USB_3_4) (see p.7, No. 19) (9-pin USB_5_6) (see p.7, No. 20)

USB_PWR PP+ GND DUMMY
1 GND
P+ PUSB_PWR

There are two headers on this motherboard. Each USB 2.0 header can support two ports.

USB 3.2 Gen1 Headers (19-pin F_USB3_1_2) (see p.7, No. 8)

Vbus IntA_PA_SSRXIntA_PA_SSRX+
GND IntA_PA_SSTXIntA_PA_SSTX+
GND IntA_PA_DIntA_PA_D+

Vbus IntA_PB_SSRXIntA_PB_SSRX+ GND IntA_PB_SSTXIntA_PB_SSTX+ GND IntA_PB_DIntA_PB_D+ Dummy 1

There are two headers on this motherboard. Each USB 3.2 Gen1 header can support two ports.

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(19-pin F_USB3_3_4) (see p.7, No. 15)

IntA_P_D+ IntA_P_DGND IntA_P_SSTX+ IntA_P_SSTXGND IntA_P_SSRX+ IntA_P_SSRXVbus
1
Vbus IntA_P_SSRXIntA_P_SSRX+ GND IntA_P_SSTXIntA_P_SSTX+ GND IntA_P_DIntA_P_D+ ID

Front Panel Audio Header (9-pin HD_AUDIO1) (see p.7, No. 26)

GND PRESENCE# MIC_RET OUT_RET
1 OUT2_L
J_SENSE OUT2_R MIC2_R MIC2_L

This header is for connecting audio devices to the front audio panel.

1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the instructions in our manual and chassis manual to install your system.
2. If you use an AC'97 audio panel, please install it to the front panel audio header by the steps below: A. Connect Mic_IN (MIC) to MIC2_L. B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L. C. Connect Ground (GND) to Ground (GND). D. MIC_RET and OUT_RET are for the HD audio panel only. You don't need to connect them for the AC'97 audio panel. E. To activate the front mic, go to the "FrontMic" Tab in the Realtek Control panel and adjust "Recording Volume".

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Chassis Water Pump Fan Connectors (4-pin CHA_FAN1/WP) (see p.7, No. 22) (4-pin CHA_FAN2/WP) (see p.7, No. 23) (4-pin CHA_FAN3/WP) (see p.7, No. 16)

GND FAN_VOLTAGE CHA_FAN_SPEED FAN_SPEED_CONTROL
1 2 3 4

This motherboard provides three 4-Pin water cooling chassis fan connectors. If you plan to connect a 3-Pin chassis water cooler fan, please connect it to Pin 1-3.

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CPU Fan Connector (4-pin CPU_FAN1) (see p.7, No. 2)
ATX Power Connector (24-pin ATXPWR1) (see p.7, No. 7)
ATX 12V Power Connector (8-pin ATX12V1) (see p.7, No. 1)
SPI TPM Header (13-pin SPI_TPM_J1) (see p.7, No. 18)

4 3 2 1
GND +12V CPU_FAN_SPEED FAN_SPEED_CONTROL

This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a 3-Pin CPU fan, please connect it to Pin 1-3.

This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13.

This motherboard

provides an 8-pin ATX

12V power connector. To

use a 4-pin ATX power

supply, please plug it along

Pin 1 and Pin 5.

*Warning: Please make

sure that the power cable

connected is for the CPU

and not the graphics

card. Do not plug the

PCIe power cable to this

connector.

SPI_DQ3 SPI_PWR Dummy CLK SPI_MOSI RST# TPM_PIRQ
1
SPI_TPM_CS# GND RSMRST# SPI_MISO SPI_CS0 SPI_DQ2

This connector supports SPI Trusted Platform Module (TPM) system, which can securely store keys, digital certificates, passwords, and data. A TPM system also helps enhance network security, protects digital identities, and ensures platform integrity.

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RGB LED Headers (4-pin RGB_LED1) (see p.7, No. 5)
(4-pin RGB_LED2) (see p.7, No. 25)
Addressable LED Headers (3-pin ADDR_LED1) (see p.7, No. 6)
(3-pin ADDR_LED2) (see p.7, No. 24)

1 12V G R B
1 GND
DO_ADDR VOUT

These two RGB headers are used to connect RGB LED extension cable which allows users to choose from various LED lighting effects. Caution: Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged. *Please refer to page 55 for further instructions on these two headers.
These two Addressable headers are used to connect Addressable LED extension cable which allows users to choose from various LED lighting effects. Caution: Never install the Addressable LED cable in the wrong orientation; otherwise, the cable may be damaged. *Please refer to page 56 for further instructions on this header.

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2.7 Post Status Checker
Post Status Checker (PSC) diagnoses the computer when users power on the machine. It emits a red light to indicate whether the CPU, memory, VGA or storage is dysfunctional. The lights go off if the four mentioned above are functioning normally.
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2.8 CrossFireXTM and Quad CrossFireXTM Operation Guide
This motherboard supports CrossFireXTM and Quad CrossFireXTM that allows you to install up to two identical PCI Express x16 graphics cards.
1. You should only use identical CrossFireXTM-ready graphics cards that are AMD certified.
2. Make sure that your graphics card driver supports AMD CrossFireXTM technology. Download the drivers from the AMD's website: www.amd.com
3. Make sure that your power supply unit (PSU) can provide at least the minimum power your system requires. It is recommended to use a AMD certified PSU. Please refer to the AMD's website for details.
4. If you pair a 12-pipe CrossFireXTM Edition card with a 16-pipe card, both cards will operate as 12-pipe cards while in CrossFireXTM mode.
5. Different CrossFireXTM cards may require different methods to enable CrossFireXTM. Please refer to AMD graphics card manuals for detailed installation guide.

2.8.1 Installing Two CrossFireXTM-Ready Graphics Cards

Step 1
Insert one graphics card into PCIE1 slot and the other graphics card to PCIE4 slot. Make sure that the cards are properly seated on the slots.

CrossFire Bridge

Step 2
Connect two graphics cards by installing a CrossFire Bridge on the CrossFire Bridge Interconnects on the top of the graphics cards. (The CrossFire Bridge is provided with the graphics card you purchase, not bundled with this motherboard. Please refer to your graphics card vendor for details.)

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Step 3 Connect a VGA/DVI/DP/HDMI cable from the monitor to the corresponding port on the graphics card installed to the PCIE1 slot.
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2.8.2 Driver Installation and Setup
Step 1 Power on your computer and boot into OS. Step 2 Remove the AMD drivers if you have any VGA drivers installed in your system.

The Catalyst Uninstaller is an optional download. We recommend using this utility to uninstall any previously installed Catalyst drivers prior to installation. Please check AMD's website for AMD driver updates.

Step 3
Install the required drivers and CATALYST Control Center then restart your computer. Please check AMD's website for details.

AMD Catalyst Control Center

Step 4
Double-click the AMD Catalyst Control Center icon in the Windows® system tray.
Step 5
In the left pane, click Performance and then AMD CrossFireXTM. Then select Enable AMD CrossFireX and click Apply. Select the GPU number according to your graphics card and click Apply.

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2.9 M.2_SSD (NGFF) Module Installation Guide (M2_1)
The M.2, also known as the Next Generation Form Factor (NGFF), is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The Hyper M.2 Socket (M2_1) supports M Key type 2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Vermeer, Matisse) or Gen3x4 (32 Gb/s) (with Cezanne, Renoir and Picasso).
Installing the M.2_SSD (NGFF) Module
Step 1 Prepare a M.2_SSD (NGFF) module and the screw.
Step 2 Depending on the PCB type and length of your M.2_SSD (NGFF) module, find the corresponding nut location to be used.

No. Nut Location PCB Length Module Type

1 A 8cm Type2280

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Step 3
Align and gently insert the M.2 (NGFF) SSD module into the M.2 slot. Please be aware that the M.2 (NGFF) SSD module only fits in one orientation.
A

20o

NUT2

NUT1

Step 4
Tighten the screw with a screwdriver to secure the module into place. Please do not overtighten the screw as this might damage the module.

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M.2_SSD (NGFF) Module Support List (M2_1)

Vendor ADATA ADATA ADATA ADATA ADATA Apacer Corsair Intel Intel Kingston Kingston OCZ PATRIOT Plextor Plextor Plextor Plextor Plextor Plextor Samsung Samsung Samsung Samsung Samsung Samsung Samsung Samsung Samsung SanDisk SanDisk TEAM TEAM WD WD

Interface PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe2 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe PCIe PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe x4 PCIe PCIe PCIe3 x4 PCIe3 x4 PCIe3 x4 PCIe3 x4

P/N ASX7000NP-128GT-C ASX8000NP-256GM-C ASX7000NP-256GT-C ASX8000NP-512GM-C ASX7000NP-512GT-C AP240GZ280 CSSD-F240GBMP500 SSDPEKKF256G7 SSDPEKKF512G7 SKC1000/480G SH2280S3/480G RVD400 -M2280-512G (NVME) PH240GPM280SSDR NVME PX-128M8PeG PX-1TM8PeG PX-256M8PeG PX-512M8PeG PX-G256M6e PX-G512M6e SM961 MZVPW128HEGM (NVM) PM961 MZVLW128HEGR (NVME) 960 EVO (MZ-V6E250) (NVME) 960 EVO (MZ-V6E250BW) (NVME) SM951 (NVME) SM951 (MZHPV256HDGL) SM951 (MZHPV512HDGL) SM951 (NVME) XP941-512G (MZHPU512HCGL) SD6PP4M-128G SD6PP4M-256G TM8FP2240G0C101 TM8FP2480GC110 WDS256G1X0C-00ENX0 (NVME) WDS512G1X0C-00ENX0 (NVME)

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for details: http://www.asrock.com

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2.10 M.2_SSD (NGFF) Module Installation Guide (M2_2)
The M.2, also known as the Next Generation Form Factor (NGFF), is a small size and versatile card edge connector that aims to replace mPCIe and mSATA. The M.2 Socket (M2_2) supports M Key type 2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s). * M2_2 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled.
Installing the M.2_SSD (NGFF) Module
Step 1 Prepare a M.2_SSD (NGFF) module and the screw.
Step 2 Depending on the PCB type and length of your M.2_SSD (NGFF) module, find the corresponding nut location to be used.

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No. Nut Location PCB Length Module Type

1 A 8cm Type2280

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Step 3 Align and gently insert the M.2 (NGFF) SSD module into the M.2 slot. Please be aware that the M.2 (NGFF) SSD module only fits in one orientation.
A

20o

NUT2

NUT1

Step 4
Tighten the screw with a screwdriver to secure the module into place. Please do not overtighten the screw as this might damage the module.

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M.2_SSD (NGFF) Module Support List (M2_2)

Vendor ADATA ADATA ADATA ADATA ADATA Crucial Crucial Intel Kingston Plextor Plextor SanDisk SanDisk Team Team Team Team Transcend Transcend Transcend V-Color V-Color V-Color V-Color WD WD

Interface SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 PCIe PCIe PCIe PCIe SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3 SATA3

P/N AXNS330E-32GM-B AXNS381E-128GM-B AXNS381E-256GM-B ASU800NS38-256GT-C ASU800NS38-512GT-C CT120M500SSD4 CT240M500SSD4 Intel SSDSCKGW080A401/80G SM2280S3 PX-G256M6e PX-G512M6e SD6PP4M-128G SD6PP4M-256G TM4PS4128GMC105 TM4PS4256GMC105 TM8PS4128GMC105 TM8PS4256GMC105 TS256GMTS400 TS512GMTS600 TS512GMTS800 VLM100-120G-2280B-RD VLM100-240G-2280RGB VSM100-240G-2280 VLM100-240G-2280B-RD WDS100T1B0B-00AS40 WDS240G1G0B-00RC30

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for details: http://www.asrock.com

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Chapter 3 Software and Utilities Operation
3.1 Installing Drivers
The Support CD that comes with the motherboard contains necessary drivers and useful utilities that enhance the motherboard's features.
Running The Support CD
To begin using the support CD, insert the CD into your CD-ROM drive. The CD automatically displays the Main Menu if "AUTORUN" is enabled in your computer. If the Main Menu does not appear automatically, locate and double click on the file "ASRSETUP.EXE" in the Support CD to display the menu.
Drivers Menu
The drivers compatible to your system will be auto-detected and listed on the support CD driver page. Please click Install All or follow the order from top to bottom to install those required drivers. Therefore, the drivers you install can work properly.
Utilities Menu
The Utilities Menu shows the application software that the motherboard supports. Click on a specific item then follow the installation wizard to install it.
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3.2 ASRock Motherboard Utility (A-Tuning)
ASRock Motherboard Utility (A-Tuning) is ASRock's multi purpose software suite with a new interface, more new features and improved utilities.
3.2.1 Installing ASRock Motherboard Utility (A-Tuning)
ASRock Motherboard Utility (A-Tuning) can be downloaded from ASRock Live Update & APP Shop. After the installation, you will find the icon "ASRock Motherboard Utility (A-Tuning)" on your desktop. Double-click the "ASRock Motherboard Utility (A-Tuning)" icon, ASRock Motherboard Utility (A-Tuning) main menu will pop up.
3.2.2 Using ASRock Motherboard Utility (A-Tuning)
There are five sections in ASRock Motherboard Utility (A-Tuning) main menu: Operation Mode, OC Tweaker, System Info, FAN-Tastic Tuning and Settings.
Operation Mode
Choose an operation mode for your computer.
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OC Tweaker
Configurations for overclocking the system.

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System Info
View information about the system. *The System Browser tab may not appear for certain models.
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FAN-Tastic Tuning
Configure up to five different fan speeds using the graph. The fans will automatically shift to the next speed level when the assigned temperature is met.
Settings
Configure ASRock ASRock Motherboard Utility (A-Tuning). Click to select "Auto run at Windows Startup" if you want ASRock Motherboard Utility (A-Tuning) to be launched when you start up the Windows operating system.
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3.3 ASRock Live Update & APP Shop
The ASRock Live Update & APP Shop is an online store for purchasing and downloading software applications for your ASRock computer. You can quickly and easily install various apps and support utilities. With ASRock Live Update & APP Shop, you can optimize your system and keep your motherboard up to date simply with a few clicks.

Double-click utility.

on your desktop to access ASRock Live Update & APP Shop

*You need to be connected to the Internet to download apps from the ASRock Live Update & APP Shop.

3.3.1 UI Overview

Category Panel

Hot News

Information Panel
Category Panel: The category panel contains several category tabs or buttons that when selected the information panel below displays the relative information. Information Panel: The information panel in the center displays data about the currently selected category and allows users to perform job-related tasks. Hot News: The hot news section displays the various latest news. Click on the image to visit the website of the selected news and know more.
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3.3.2 Apps
When the "Apps" tab is selected, you will see all the available apps on screen for you to download.
Installing an App
Step 1 Find the app you want to install.
The most recommended app appears on the left side of the screen. The other various apps are shown on the right. Please scroll up and down to see more apps listed. You can check the price of the app and whether you have already intalled it or not.
- The red icon displays the price or "Free" if the app is free of charge. - The green "Installed" icon means the app is installed on your computer. Step 2 Click on the app icon to see more details about the selected app.
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Step 3 If you want to install the app, click on the red icon

to start downloading.

Step 4
When installation completes, you can find the green "Installed" icon appears on the upper right corner.

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To uninstall it, simply click on the trash can icon . *The trash icon may not appear for certain apps.
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Upgrading an App
You can only upgrade the apps you have already installed. When there is an available new version for your app, you will find the mark of "New Version" appears below the installed app icon.

Step 1 Click on the app icon to see more details.

Step 2

Click on the yellow icon

to start upgrading.

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3.3.3 BIOS & Drivers
Installing BIOS or Drivers
When the "BIOS & Drivers" tab is selected, you will see a list of recommended or critical updates for the BIOS or drivers. Please update them all soon.

Step 1 Please check the item information before update. Click on Step 2

to see more details.

Click to select one or more items you want to update. Step 3

Click Update to start the update process.

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3.3.4 Setting
In the "Setting" page, you can change the language, select the server location, and determine if you want to automatically run the ASRock Live Update & APP Shop on Windows startup.
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3.4 ASRock Polychrome SYNC
ASRock Polychrome SYNC is a lighting control utility specifically designed for unique individuals with sophisticated tastes to build their own stylish colorful lighting system. Simply by connecting the LED strip, you can customize various lighting schemes and patterns, including Static, Breathing, Strobe, Cycling, Music, Wave and more.
Connecting the LED Strip
Connect your RGB LED strips to the RGB LED Headers (RGB_LED1, RGB_LED2) on the motherboard.

RGB_LED1

12V G R

RGB_LED2
1 12V G R B

1. Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged.
2. Before installing or removing your RGB LED cable, please power off your system and unplug the power cord from the power supply. Failure to do so may cause damages to motherboard components.
1. Please note that the RGB LED strips do not come with the package. 2. The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a
maximum power rating of 3A (12V) and length within 2 meters.

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Connecting the Addressable RGB LED Strip
Connect your Addressable RGB LED strips to the Addressable LED Headers (ADDR_LED1, ADDR_LED2) on the motherboard.
ADDR_LED1
1
ADDR_LED2
1 GND
DO_ADDR VOUT
1. Never install the RGB LED cable in the wrong orientation; otherwise, the cable may be damaged.
2. Before installing or removing your RGB LED cable, please power off your system and unplug the power cord from the power supply. Failure to do so may cause damages to motherboard components.
1. Please note that the RGB LED strips do not come with the package. 2. The RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/
GND), with a maximum power rating of 3A (5V) and length within 2 meters.
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ASRock Polychrome SYNC Utility
Now you can adjust the RGB LED color through the ASRock Polychrome SYNC Utility. Download this utility from the ASRock Live Update & APP Shop and start coloring your PC style your way!
Drag the tab to customize your preference.

Toggle on/off the RGB LED switch
Sync RGB LED effects for all LED regions of the motherboard

Select a RGB LED light effect from the drop-down menu.

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Chapter 4 UEFI SETUP UTILITY
4.1 Introduction
This section explains how to use the UEFI SETUP UTILITY to configure your system. You may run the UEFI SETUP UTILITY by pressing <F2> or <Del> right after you power on the computer, otherwise, the Power-On-Self-Test (POST) will continue with its test routines. If you wish to enter the UEFI SETUP UTILITY after POST, restart the system by pressing <Ctl> + <Alt> + <Delete>, or by pressing the reset button on the system chassis. You may also restart by turning the system off and then back on.
Because the UEFI software is constantly being updated, the following UEFI setup screens and descriptions are for reference purpose only, and they may not exactly match what you see on your screen.

4.1.1 UEFI Menu Bar
The top of the screen has a menu bar with the following selections:

Main

For setting system time/date information

OC Tweaker

For overclocking configurations

Advanced

For advanced system configurations

Tool

Useful tools

H/W Monitor

Displays current hardware status

Security

For security settings

Boot

For configuring boot settings and boot priority

Exit

Exit the current screen or the UEFI Setup Utility

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4.1.2 Navigation Keys
Use < > key or < > key to choose among the selections on the menu bar, and use < > key or < > key to move the cursor up or down to select items, then press <Enter> to get into the sub screen. You can also use the mouse to click your required item.
Please check the following table for the descriptions of each navigation key.

Navigation Key(s) Description

+ / -

To change option for the selected items

<Tab>

Switch to next function

<PGUP>

Go to the previous page

<PGDN>

Go to the next page

<HOME>

Go to the top of the screen

<END>

Go to the bottom of the screen

<F1>

To display the General Help Screen

<F7>

Discard changes and exit the SETUP UTILITY

<F9>

Load optimal default values for all the settings

<F10>

Save changes and exit the SETUP UTILITY

<F12>

Print screen

<ESC>

Jump to the Exit Screen or exit the current screen

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4.2 Main Screen
When you enter the UEFI SETUP UTILITY, the Main screen will appear and display the system overview.
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4.3 OC Tweaker Screen
In the OC Tweaker screen, you can set up overclocking features.

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Because the UEFI software is constantly being updated, the following UEFI setup screens and descriptions are for reference purpose only, and they may not exactly match what you see on your screen.
Overclock Mode(Bus Speed)
Select the overclock mode. Warning! When overclocking also the PCIe, PCI, SATA and USB busses will be overcloked which may cause instability or failure. Please install an operating system and the drivers required before overclocking, or else your HDD's may be undetectable. Overclocking is not supported if the monitor is connected via the onboard D-Bus/VGA connector.
CPU Frequency and Voltage(VID) Change
If this item is set to [Manual], the multiplier and voltage will be set based on user selection. Final result is depending on the CPU's capability.
CPU Core (Per CCX) CPU Voltage
Specifies a custom CPU core voltage (mV), Should be combined with a custom CPU core
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frequency. Power saving features for idle cores (e.g. cc6 sleep) remain active.
CCD0 CCX0 Frequency (MHz)
Use this item to adjust CCX0 Frequency.
CCX1 Frequency (MHz)
Use this item to adjust CCX1 Frequency.
CCD1 CCX0 Frequency (MHz)
Use this item to adjust CCX0 Frequency.
CCX1 Frequency (MHz)
Use this item to adjust CCX1 Frequency.
SoC/Uncore OC Voltage(VID)
Specify the SoC/Uncore voltage (VDD_SOC) in mV to support memory and Infinity Fabric overclocking. VDD_SOC also determines the GPU voltage on processors with integrated graphics. "SoC/Uncore OC Mode" needs to be enabled to force this voltage.
CLD0 VDDP Voltage Control
AMD Overclocking Setup VDDP is a voltage for the DDR4 bus signaling (PHY), and it is derived from your DRAM Voltage (VDDIO_Mem). As a result, VDDP voltage in mV can approach but not exceed your DRAM Voltage.
CLD0 VDDG CCD Voltage Control
AMD Overclocking Setup VDDG CCD represents voltage for the data portion of the Infinity Fabric. It is derived from the CPU SoC/Uncore Voltage (VDD_SOC). VDDG can approach but not exceed VDD_SOC.
CLD0 VDDG IOD Voltage Control
AMD Overclocking Setup VDDG IOD represents voltage for the data portion of the Infinity Fabric. It is derived from the CPU SoC/Uncore Voltage (VDD_SOC). VDDG can approach but not exceed VDD_SOC.
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DRAM Information Load XMP Setting
Load XMP settings to overclock the memory and perform beyond standard specifications.
DRAM Frequency
If [Auto] is selected, the motherboard will detect the memory module(s) inserted and assign the appropriate frequency automatically. Setting DRAM Frequency can adjust DRAM Timing.
DRAM Voltage
Configure the voltage for the DRAM Voltage.
Infinity Fabric Frequency and Dividers
AMD Overclocking Setup Set Infinity Fabric frequency (FCLK). Auto: FCLK = MCLK. Manual: FCLK must be less than or equal to MCLK for best performance in most cases. Latency penalties are incurred if FCLK and MCLK are mismatched, but sufficiently high MCLK can negate or overcome this penalty.
DRAM Timing Configuration External Voltage Settings and Load-line Calibration CPU Vcore Voltage
Input voltage for the processor by the external voltage regulator.
CPU Load-Line Calibration
CPU Load-Line Calibration helps prevent CPU voltage droop when the system is under heavy loading.
VDDCR_SOC Voltage
Input voltage for the processor by the external voltage regulator.
VDDCR_SOC Load-Line Calibration
VDDCR_SOC Load-Line Calibration helps prevent VDDCR_SOC voltage droop when the system is under heavy loading.
VPPM
Configure the voltage for the VPPM.
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2.50V Voltage
Configure the voltage for the 2.50V PROM Voltage.
CPU VDD 1.8V Voltage
Configure the voltage for the CPU VDD 1.8V Voltage. The default value is [Auto].
Save User Default
Type a profile name and press enter to save your settings as user default.
Load User Default
Load previously saved user defaults.
Save User UEFI Setup Profile to Disk
It helps you to save current UEFI settings as an user profile to disk.
Load User UEFI Setup Profile from Disk
You can load previous saved profile from the disk.
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4.4 Advanced Screen
In this section, you may set the configurations for the following items: CPU Configuration, Onboard Devices Configuration, Storage Configuration, ACPI Configuration, Trusted Computing, AMD CBS, AMD PBS and AMD Overclocking.
Setting wrong values in this section may cause the system to malfunction.
UEFI Configuration Active Page on Entry
Select the default page when entering the UEFI setup utility.
Full HD UEFI
When [Auto] is selected, the resolution will be set to 1920 x 1080 if the monitor supports Full HD resolution. If the monitor does not support Full HD resolution, then the resolution will be set to 1024 x 768. When [Disable] is selected, the resolution will be set to 1024 x 768 directly.
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4.4.1 CPU Configuration
PSS Support
Use this to enable or disable the generation of ACPI_PPC, _PSS, and _PCT objects.
NX Mode
Use this to enable or disable NX mode.
SVM Mode
When this is set to [Enabled], a VMM (Virtual Machine Architecture)can utilize the additional hardware capabilities provided by AMD-V. The default value is [Enabled]. Coniguration options: [Enabled] and [Disabled].
SMT Mode
This item can be used to disable symmetric multithreading. To re-enable SMT, a power cycle is needed after selecting [Auto]. Warning: S3 is not supported on systems where SMT is disabled.
AMD fTPM Switch
Use this to enable or disable AMD CPU fTPM.
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4.4.2 Onboard Devices Configuration

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Turn On LED in S5
Turn on LED in the ACPI S5 state.
SR-IOV Support
Enable/disable the SR-IOV (Single Root IO Virtualization Support) if the system has SR-IOV capable PCIe devices.
UMA Frame buffer Size (Only for processor with integrated graphics)
This item allows you to set the size of the UMA frame buffer.
Gnb HD Audio
Enable/disable onboard HD audio. Set to Auto to enable onboard HD audio and automatically disable it when a sound card is installed.
Front Panel
Enable/disable front panel HD audio.
Restore on AC/Power Loss
Select the power state after a power failure. If [Power Off] is selected, the power will remain off when the power recovers. If [Power On] is selected, the system will start to boot up when the power recovers.
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WAN Radio
Configure the WiFi module's connectivity.
BT On/Off
Enable/disable the bluetooth.
PS2 Y-Cable
Enable the PS2 Y-Cable or set this option to Auto.
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4.4.3 Storage Configuration

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SATA Mode
AHCI: Supports new features that improve performance. RAID: Combine multiple disk drives into a logical unit.
SATA Hot Plug
Enable/disable the SATA Hot Plug function.
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4.4.4 ACPI Configuration
Suspend to RAM
It is recommended to select auto for ACPI S3 power saving.
Deep Sleep
Configure deep sleep mode for power saving when the computer is shut down.
PS/2 Keyboard S4/S5 Wakeup Support
Allow the system to be waked up by a PS/2 Keyboard in S4/S5.
USB Keyboard/Mouse Power On
Allow the system to be waked up by an USB Keyboard/Mouse device.
PCIE Devices Power On
Allow the system to be waked up by a PCIE device and enable wake on LAN.
RTC Alarm Power On
Allow the system to be waked up by the real time clock alarm. Set it to By OS to let it be handled by your operating system.
USB Power Delivery in Soft Off State (S5)
If this option is enabled, the USB port will provide power to your devices even when the system is in Power State S5. 70

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4.4.5 Trusted Computing

B550M-C

Security Device Support
Enable or disable BIOS support for security device.

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4.4.6 AMD CBS
The AMD CBS menu accesses AMD specific features. 72

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4.4.7 AMD PBS

B550M-C

The AMD PBS menu accesses AMD specific features.

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4.4.8 AMD Overclocking
The AMD Overclocking menu accesses options for configuring CPU frequency and voltage.
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4.5 Tools

B550M-C

Easy RAID Installer
Easy RAID Installer helps you to copy the RAID driver from the support CD to your USB storage device. After copying the drivers please change the SATA mode to RAID, then you can start installing the operating system in RAID mode.
SSD Secure Erase Tool
Use this tool to securely erase SSD.
NVME Sanitization Tool
After you sanitize SSD, all user data will be permantly destroyed on the SSD and cannot be recovered.
Instant Flash
Save UEFI files in your USB storage device and run Instant Flash to update your UEFI.
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4.6 Hardware Health Event Monitoring Screen
This section allows you to monitor the status of the hardware on your system, including the parameters of the CPU temperature, motherboard temperature, fan speed and voltage.
CPU FAN1 Setting
Select a fan mode for CPU Fan 1, or choose Customize to set 5 CPU temperatures and assign a respective fan speed for each temperature.
CPU FAN1 Temp Source
Select a fan temperature source for CPU Fan 1.
FAN Configuration CHA_FAN1/WP Switch
Select CHA_FAN1 or Water Pump mode.
Chassis Fan 1 Control Mode
Select PWM mode or DC mode for Chassis Fan 1 .
Chassis Fan 1 Setting
Select a fan mode for Chassis Fan 1, or choose Customize to set 5 CPU temperatures and assign a respective fan speed for each temperature.
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B550M-C
Chassis Fan 1 Temp Source
Select a fan temperature source for Chassis Fan 1.
CHA_FAN2/WP Switch
Select CHA_FAN2 or Water Pump mode.
Chassis Fan 2 Control Mode
Select PWM mode or DC mode for Chassis Fan 2 .
Chassis Fan 2 Setting
Select a fan mode for Chassis Fan 2, or choose Customize to set 5 CPU temperatures and assign a respective fan speed for each temperature.
Chassis Fan 2 Temp Source
Select a fan temperature source for Chassis Fan 2.
CHA_FAN3/WP Switch
Select CHA_FAN3 or Water Pump mode.
Chassis Fan 3 Control Mode
Select PWM mode or DC mode for Chassis Fan 3 .
Chassis Fan 3 Setting
Select a fan mode for Chassis Fan 3, or choose Customize to set 5 CPU temperatures and assign a respective fan speed for each temperature.
Chassis Fan 3 Temp Source
Select a fan temperature source for Chassis Fan 3.
Fan-Tastic
Select a fan mode for Fan, or choose Customize to set 5 CPU temperatures and assign a respective fan speed for each temperature.
FanTuning
Detect the lowest fan speed in the system. Iy may take 3-5 minutes to complete.
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4.7 Security Screen
In this section you may set or change the supervisor/user password for the system. You may also clear the user password.
Supervisor Password
Set or change the password for the administrator account. Only the administrator has authority to change the settings in the UEFI Setup Utility. Leave it blank and press enter to remove the password.
User Password
Set or change the password for the user account. Users are unable to change the settings in the UEFI Setup Utility. Leave it blank and press enter to remove the password.
Secure Boot
Enable to support Secure Boot.
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B550M-C
4.8 Boot Screen
This section displays the available devices on your system for you to configure the boot settings and the boot priority.
Boot From Onboard LAN
Allow the system to be waked up by the onboard LAN.
Setup Prompt Timeout
Configure the number of seconds to wait for the setup hot key.
Fast Boot
Fast Boot minimizes your computer's boot time. In fast mode you may not boot from an USB storage device.
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CSM (Compatibility Support Module)
CSM
Enable to launch the Compatibility Support Module. Please do not disable unless you're running a WHCK test.
Launch PXE OpROM Policy
Select UEFI only to run those that support UEFI option ROM only. Select Legacy only to run those that support legacy option ROM only. Select Do not launch to not execute both legacy and UEFI option ROM.
Launch Storage OpROM Policy
Select UEFI only to run those that support UEFI option ROM only. Select Legacy only to run those that support legacy option ROM only. Select Do not launch to not execute both legacy and UEFI option ROM.
Bootup Num-Lock
Select whether Num Lock should be turned on or off when the system boots up.
Full Screen Logo
Enable to display the boot logo or disable to show normal POST messages.
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B550M-C AddOn ROM Display
Enable AddOn ROM Display to see the AddOn ROM messages or configure the AddOn ROM if you've enabled Full Screen Logo. Disable for faster boot speed.
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4.9 Exit Screen
Save Changes and Exit
When you select this option the following message, "Save configuration changes and exit setup?" will pop out. Select [OK] to save changes and exit the UEFI SETUP UTILITY.
Discard Changes and Exit
When you select this option the following message, "Discard changes and exit setup?" will pop out. Select [OK] to exit the UEFI SETUP UTILITY without saving any changes.
Discard Changes
When you select this option the following message, "Discard changes?" will pop out. Select [OK] to discard all changes.
Load UEFI BIOS Defaults
Load UEFI BIOS Default values for all the setup questions. The F9 key can be used for this operation.
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Contact Information
If you need to contact ASRock or want to know more about ASRock, you're welcome to visit ASRock's website at http://www.asrock.com; or you may contact your dealer for further information. For technical questions, please submit a support request form at https://event.asrock.com/tsd.asp ASRock Incorporation 2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District, Taipei City 112, Taiwan (R.O.C.) ASRock EUROPE B.V. Bijsterhuizen 11-11 6546 AR Nijmegen The Netherlands Phone: +31-24-345-44-33 Fax: +31-24-345-44-38 ASRock America, Inc. 13848 Magnolia Ave, Chino, CA91710 U.S.A. Phone: +1-909-590-8308 Fax: +1-909-590-1026

DECLARATION OF CONFORMITY
Per FCC Part 2 Section 2.1077(a)
Responsible Party Name: ASRock Incorporation Address: 13848 Magnolia Ave, Chino, CA91710
Phone/Fax No: +1-909-590-8308/+1-909-590-1026 hereby declares that the product
Product Name : Motherboard Model Number : B550M-C Conforms to the following specifications:
FCC Part15, SubpartB,Unintentional Radiators Supplementary Information:
is device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) is device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Representative Person's Name: James
Signature : Date : May 12, 2017

EU Declaration of Conformity

For the following equipment: Motherboard (Product Name)

B550M-C / ASRock (Model Designation / Trade Name)

ASRock Incorporation (Manufacturer Name)

2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District, Taipei City 112, Taiwan (R.O.C.) (Manufacturer Address)

Radio Equipment Directive - 2014/53/EU
¾EN 300 328 V2.2.2 ¾EN 301 893 V2.1.1 ½ EN 300 330 V2.1.1
EMC Directive - 2014/30/EU
¾EN 301 489-1 V2.2.3 ¾EN 301 489-17 V3.2.4 ½EN 301 489-3 V2.1.1 ¾EN 55032:2015/A11:2020 ¾EN 61000-3-2:2014 ¾EN 61000-3-3:2013

¾EN 55024:2010/A1:2015 ½EN 55035:2017/A11:2020 ¾EN 61000-4-2:2009 ¾EN 61000-4-3:2006/A1:2008/A2:2010 ¾EN 61000-4-4:2012 ¾EN 61000-4-5:2014/A1:2017 ¾EN 61000-4-6:2014/AC:2015 ¾EN 61000-4-8:2010 ¾EN 61000-4-11:2004/A1:2017

Low Voltage Directive - 2014/35/EU
½EN 62368-1:2014 ½EN 62368-1:2014/A11:2017

½EN 62311:2008

RoHS Directive - 2011/65/EU
¾(EU) 2015/863¾EN 50581:2012

CE marking

(EU conformity marking)

ASRock EUROPE B.V. (Company Name)
Bijsterhuizen 1111 6546 AR Nijmegen The Netherlands (Company Address)
Person responsible for making this declaration:

(Name, Surname) A.V.P (Position / Title) September 24, 2021 (Date)

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