ASRock B550M-C R2.0 AMD AM4 MicroATX Motherboard User Guide

ASRock B550M-C R2.0 AMD AM4 MicroATX Motherboard

Specifications

• Platform: B550M-C R2.0
• CPU: Compatible with AMD AM4 Socket Ryzen™ 5000 & 3000 Series processors
• Chipset: AMD B550
• Memory: – 4 x DDR4 DIMM Slots – Supports DDR4 4733 (OC)/4600(OC)/4533(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733(OC)/3600(OC)/3466(OC)/3200/2933/2667/2400/2133 non-ECC, un-buffered memory – Max. capacity of 128GB
• Expansion Slots: – 1 x PCI Express 4.0 x16 Slot (PCIE1: x16 mode) – 1 x PCI Express 3.0 x16 Slot (PCIE2: x4 mode) – 2 x PCI Express 3.0 x1 Slots
• Graphics: – Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU – DirectX 12, Pixel Shader 5.0 – Shared memory default 2GB. Max Shared memory supports up to 16GB.**
• Audio: Realtek ALC887 Audio Codec
• LAN: Realtek RTL8111H Gigabit LAN Controller
• Wireless LAN: Intel® Wi-Fi 6 AX200 Module (Supports IEEE 802.11a/b/g/n/ac/ax)
• USB: – 2 x USB 3.2 Gen2 Type-A Ports (10 Gb/s) (Supports ESD Protection) – 6 x USB 3.2 Gen1 Ports (Supports ESD Protection) – 4 x USB 2.0 Ports (Supports ESD Protection)
• Storage: – 4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug – 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Ryzen Series CPU) or Gen3x4 (32 Gb/s) (with Renoir, Picasso and Raven Ridge Series CPU) – 1 x M.2 Socket (M2_2), supports M Key type 2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)
• Connectors: – 1 x COM Port Header – 1 x TPM Header – 1 x Chassis Intrusion and Speaker Header – 1 x CPU Fan Connector (4-pin) (Smart Fan Speed Control)* – 1 x Chassis/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)** – 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) – 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection) – 1 x Front Panel Type C USB 3.2 Gen1 Header (Supports ESD Protection) – 1 x Dr. Debug with LED
• BIOS Feature: – 128Mb AMI UEFI Legal BIOS with multilingual GUI support – ACPI 6.0 Compliant wake up events – SMBIOS 2.7 Support – CPU, DRAM, PCH 1.05V, VDDP, PROM 2.5V, Voltage Multi-adjustment
• OS: Microsoft® Windows® 10 64-bit
• Certifications: FCC, CE

Chapter 1: Introduction

Package Contents
The package includes the following items:

• 1 x ASRock B550M-C R2.0 Motherboard
• 1 x I/O Shield
• 2 x SATA Data Cables
• 1 x Quick Installation Guide

The specifications of the ASRock B550M-C R2.0 motherboard are as follows:

• Platform: B550M-C R2.0
• CPU: Compatible with AMD AM4 Socket Ryzen™ 5000 & 3000
• Series processors
• Chipset: AMD B550
• Memory: … (details omitted for brevity)
• Expansion Slots: … (details omitted for brevity)
• Graphics: … (details omitted for brevity)
• Audio: Realtek ALC887 Audio Codec
• LAN: Realtek RTL8111H Gigabit LAN Controller
• Wireless LAN: Intel® Wi-Fi 6 AX200 Module (Supports IEEE 802.11a/b/g/n/ac/ax)
• USB: … (details omitted for brevity)
• Storage: … (details omitted for brevity)
• Connectors: … (details omitted for brevity)
• BIOS Feature: … (details omitted for brevity)
• OS: Microsoft® Windows® 10 64-bit
• Certifications: FCC, CE

Motherboard Layout

The layout of the ASRock B550M-C R2.0 motherboard is as follows:

I/O Panel
The I/O panel of the ASRock B550M-C R2.0 motherboard includes the following ports:

• 1 x PS/2 Mouse/Keyboard Port
• 1 x D-Sub Port
• 1 x HDMI Port
• 4 x USB 2.0 Ports
• 2 x USB 3.2 Gen1 Ports
• 2 x USB 3.2 Gen2 Type-A Ports
• 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
• HD Audio Jacks: Line in / Front Speaker / Microphone

Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz Antennas
The ASRock B550M-C R2.0 motherboard supports the 802.11ax Wi-Fi 6E standard. It comes with ASRock WiFi 2.4/5/6 GHz antennas for wireless connectivity.

Chapter 2: Installation

Installing the CPU
To install the CPU on the ASRock B550M-C R2.0 motherboard, follow these steps:

1. Open the CPU socket by lifting the lever.
2. Align the CPU notches with the socket alignment keys.
3. Gently place the CPU into the socket.
4. Close the CPU socket by lowering the lever.

Installing the CPU Fan and Heatsink
To install the CPU fan and heatsink on the ASRock B550M-C R2.0 motherboard, follow these steps:

1. Apply a small amount of thermal paste on the center of the CPU.
2. Place the CPU fan and heatsink on top of the CPU.
3. Secure the CPU fan and heatsink using the provided screws or clips.

FAQs

Q: Where can I find more information about ASRock?
A: You can visit ASRock’s website at http://www.asrock.com for more information about ASRock.

Q: How can I contact ASRock for technical support?
A: For technical questions, please submit a support request form at https://event.asrock.com/tsd.asp. You can also find contact information for ASRock’s offices in different regions in the user manual.

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 e-mail: [email protected] ASRock EUROPE B.V. e-mail: [email protected] ASRock America, Inc. e-mail: [email protected]
Scan the QR code to view more manuals and documents.

Chapter 1 Introduction
Thank you for purchasing ASRock B550M-C R2.0 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.

Package Contents
·ASRock B550M-C R2.0 Motherboard (Micro ATX Form Factor) · 1 x I/O Panel Shield · 2 x Serial ATA (SATA) Data Cables (Optional) · 2 x ASRock WiFi 2.4/5/6 GHz Antennas (Optional) · 2 x Screws for M.2 Sockets (Optional)

· 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.

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, un-buffered memory · AMD Ryzen series APUs (Renoir) support DDR4 4733+(OC)/4666(OC)/4600(OC)/4533(OC)/4466(OC)/44 00(OC)/4333(OC)/4266(OC)/4200(OC)/4133(OC)/4000(O C)/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 (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

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 · Supports AMD CrossFireTM · 2 x PCI Express 3.0 x16 Slots (PCIE2/PCIE3: x1 mode) · 1 x Vertical M.2 Socket (Key E), supports type 2230 WiFi/
  BT PCIe WiFi module

Graphics

· Integrated AMD RadeonTM Vega Series Graphics in Ryzen Series APU (Actual support may vary by CPU)
· 1 x HDMI 2.1, supports HDR, HDCP 2.3, 4K Ultra HD (UHD) playback and max. resolution up to 4K 60Hz

• Picasso supports HDCP 2.2 with HDMI 2.0 Port

Audio

· 7.1 CH HD Audio (Realtek ALC897 Audio Codec)

LAN

· Gigabit LAN 10/100/1000 Mb/s · Realtek RTL8111H

Wireless LAN

· 802.11ax Wi-Fi 6E Module · Supports IEEE 802.11a/b/g/n/ac/ax · Supports Dual-Band 2×2 with extended 6GHz band sup-
port Wi-Fi 6E (6GHz band) will be supported by Microsoft® Windows® 11. The availability will depend on the different regulation status of each country and region. It will be activated (for supported countries) through Windows Update and software updates once available. * A 6GHz compatible router is required for 6E functionality. · 2 antennas to support 2 (Transmit) x 2 (Receive) diversity
technology · Supports Bluetooth 5.2 + High speed class II · Supports MU-MIMO

USB

· 1 x USB 3.2 Gen2 Type-C (Rear)

· 1 x USB 3.2 Gen2 Type-A (Rear)

· 1 x USB 3.2 Gen1 Type-C (Front)

· 8 x USB 3.2 Gen1 Type-A (4 Rear, 4 Front)

· 6 x USB 2.0 (2 Rear, 4 Front)

• All USB ports support ESD Protection

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) · 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) · 4 x USB 3.2 Gen1 Ports · 2 x USB 2.0 Ports · 1 x RJ-45 LAN Port · HD Audio Jacks: Line in / Front Speaker / Microphone

Storage

CPU: · 1 x Hyper M.2 Socket (M2_1, Key M), supports type 2280

PCIe Gen4x4 (64 Gb/s) mode (with Vermeer, Matisse)

or Gen3x4 (32 Gb/s) mode (with Cezanne, Renoir and

Picasso)*

Chipset

· 1 x M.2 Socket (M2_2, Key M), supports type 2280 SATA3

6.0 Gb/s & PCIe Gen3x2 (16 Gb/s) modes*

· 5 x SATA3 6.0 Gb/s Connectors 4

B550M-C R2.0

• Supports NVMe SSD as boot disks * M2_2 and SATA3_4_5 share lanes. If either one of them is in use, the other one will be disabled.

RAID

· Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices

Connector

· 1 x SPI TPM Header · 1 x Power LED and Speaker Header · 2 x RGB LED Headers · 2 x Addressable LED Headers · 1 x CPU Fan Connector (4-pin) · 3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart
Fan Speed Control)* · 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) · 2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports) · 1 x Front Panel Type C USB 3.2 Gen1 Header Support in total up to 12V/3A, 36W LED Strip
* Support in total up to 5V/3A, 15W LED Strip
CPU_FAN1 supports the fan power up to 1A (12W).
CHA_FAN1~3/WP support the fan power up to 2A (24W).
CHA_FAN1~3/WP can auto detect if 3-pin or 4-pin fan is
in use.

BIOS Feature

· AMI UEFI Legal BIOS with GUI support

OS

· 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.
6

Motherboard Layout
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 Front Panel Type C USB 3.2 Gen1 Header (F_USB3_TC_1) 10 SATA3 Connector (SATA3_3) (Upper), SATA3 Connector (SATA3_2) (Lower) 11 SATA3 Connector (SATA3_5) (Upper), SATA3 Connector (SATA3_4) (Lower) 12 System Panel Header (PANEL1) 13 Power LED and Speaker Header (SPK_PLED1) 14 USB 3.2 Gen1 Header (F_USB3_3_4) 15 Chassis/Water Pump Fan Connector (CHA_FAN3/WP) 16 Post Status Checker (PSC) 17 SPI TPM Header (SPI_TPM_J1) 18 SATA3 Connector (SATA3_1) 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)

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

802.11ax Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz Antennas
802.11ax Wi-Fi 6E + BT Module
This motherboard comes with an exclusive 802.11 a/b/g/n/ac/ax Wi-Fi 6E + BT module that offers support for 802.11 a/b/g/n/ac/ax Wi-Fi 6E connectivity standards and Bluetooth. Wi-Fi 6E + BT module is an easy-to-use wireless local area network (WLAN) adapter to support Wi-Fi 6E + BT. Bluetooth standard features Smart Ready technology that adds a whole new class of functionality into the mobile devices. BT also includes Low Energy Technology and ensures extraordinary low power consumption for PCs. The transmission speed may vary according to the environment. Wi-Fi 6E (6GHz band) will be supported by Microsoft® Windows® 11. The availability will depend on the different regulation status of each country and region. It will be activated (for supported countries) through Windows Update and software updates once available. * A 6GHz compatible router is required for 6E functionality.
10

B550M-C R2.0 WiFi Antennas Installation Guide
Step 1 Prepare the WiFi 2.4/5/6 GHz Antennas that come with the package. Step 2 Connect the two WiFi 2.4/5/6 GHz Antennas to the antenna connectors. Turn the antenna clockwise until it is securely connected.
Step 3 Set the WiFi 2.4/5/6 GHz Antenna as shown in the illustration. *You may need to adjust the direction of the antenna for a stronger signal.
11

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.

B550M-C R2.0
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
*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard.

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.

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

English

27

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.

English

28

B550M-C R2.0
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.

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. 12)

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.

Power LED and Speaker Header (7-pin SPK_PLED1) (see p.7, No. 13)
30

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

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

English

B550M-C R2.0

Serial ATA3 Connectors Right Angle: (SATA3_3: see p.7, No. 10) (Upper) (SATA3_2: see p.7, No. 10) (Lower) (SATA3_5: see p.7, No. 11) (Upper) SATA3_1 (SATA3_4: see p.7, No. 11) (Lower) Vertical: (SATA3_1: see p.7, No. 18)

SATA3_5 SATA3_3 SATA3_4 SATA3_2

These five SATA3 connectors support SATA data cables for internal storage devices with up to 6.0 Gb/s data transfer rate. * M2_2 and SATA3_4_5 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)
(19-pin F_USB3_3_4) (see p.7, No. 14)

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

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

1. High 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”.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. 15)

GND FAN_VOLTAGE CHA_FAN_SPEED FAN_SPEED_CONTROL

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.

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. 17)

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.

12

24

1

13

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

8

5

This motherboard

provides an 8-pin ATX

4

1

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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CrossFireTM Operation Guide

This motherboard supports CrossFireTM that allows you to install up to two identical PCI Express x16 graphics cards.
1. You should only use identical CrossFireTM-ready graphics cards that are AMD certified.
2. Make sure that your graphics card driver supports AMD CrossFireTM 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 CrossFireTM Edition card with a 16-pipe card, both cards will operate as 12-pipe cards while in CrossFireTM mode.
5. Different CrossFireTM cards may require different methods to enable CrossFireTM. Please refer to AMD graphics card manuals for detailed installation guide.

Installing Two CrossFireTM-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 BridgeStep 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.)
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.

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

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

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_4_5 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.

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
Chapter 3 Software and Utilities Operation
3.1 Installing Drivers
Go to our website to download the necessary drivers and useful utilities that enhance the motherboard’s features.

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

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.

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 icoto 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.

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 or 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 + + , 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