ASROCK B550M-C R2.0 User manual

Contact Information
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your dealer for further information. For technical questions, please submit a
support request form at https://event.asrock.com/tsd.asp
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e-mail: [e-mail]
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e-mail: [e-mail]
ASRock America, Inc.
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Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 7
1.4 I/O Panel 9
1.5 802.11ax Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz
Antennas 10
Chapter 2 Installation 12
2.1 Installing the CPU 13
2.2 Installing the CPU Fan and Heatsink 15
2.3 Installing Memory Modules (DIMM) 23
2.4 Expansion Slots (PCI Express Slots) 27
2.5 Jumpers Setup 29
2.6 Onboard Headers and Connectors 30
2.7 Post Status Checker 35
2.8 CrossFireTM Operation Guide 36
2.8.1 Installing Two CrossFireTM-Ready Graphics Cards 36
2.8.2 Driver Installation and Setup 38
2.9 M.2_SSD (NGFF) Module Installation Guide (M2_1) 39
2.10 M.2_SSD (NGFF) Module Installation Guide (M2_2) 42
Chapter 3 Software and Utilities Operation 45
3.1 Installing Drivers 45

3.2 ASRock Motherboard Utility (A-Tuning) 46
3.2.1 Installing ASRock Motherboard Utility (A-Tuning) 46
3.2.2 Using ASRock Motherboard Utility (A-Tuning) 46
3.3 ASRock Live Update & APP Shop 49
3.3.1 UI Overview 49
3.3.2 Apps 50
3.3.3 BIOS & Drivers 53
3.3.4 Setting 54
3.4 ASRock Polychrome SYNC 55
Chapter 4 UEFI SETUP UTILITY 58
4.1 Introduction 58
4.1.1 UEFI Menu Bar 58
4.1.2 Navigation Keys 59
4.2 Main Screen 60
4.3 OC Tweaker Screen 61
4.4 Advanced Screen 65
4.4.1 CPU Conguration 66
4.4.2 Onboard Devices Conguration 67
4.4.3 Storage Conguration 69
4.4.4 ACPI Conguration 70
4.4.5 Trusted Computing 71
4.4.6 AMD CBS 72
4.4.7 AMD PBS 73
4.4.8 AMD Overclocking 74

4.5 Tools 75
4.6 Hardware Health Event Monitoring Screen 76
4.7 Security Screen 78
4.8 Boot Screen 79
4.9 Exit Screen 82

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B550M-C R2.0
Chapter 1 Introduction
ank 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 soware and utilities. Chapter 4 contains the conguration guide of
the BIOS setup.
1.1 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)
Because the motherboard specications and the BIOS soware might be updated, the
content of this documentation will be subject to change without notice. In case any
modications 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 specic information about the model
you are using. You may nd the latest VGA cards and CPU support list on ASRock’s
website as well. ASRock website http://www.asrock.com.

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1.2 Specications
Platform • Micro ATX Form Factor
CPU • Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series,
4000 G-Series, 5000 and 5000 G-Series Desktop
Processors*
* Not compatible with AMD Athlon™ Processors.
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-buered 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-buered 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-buered 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-buered
memory*
• AMD Ryzen series APUs (Picasso) support DDR4
3333+(OC)/3200(OC)/2933/2667/2400/2133 non-ECC, un-
buered memory*

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B550M-C R2.0
* 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 Prole (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

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Wireless
LAN
• 802.11ax Wi-Fi 6E Module
• Supports IEEE 802.11a/b/g/n/ac/ax
• Supports Dual-Band 2x2 with extended 6GHz band* sup-
port
* Wi-Fi 6E (6GHz band) will be supported by Microso® Win-
dows® 11. e availability will depend on the dierent regula-
tion status of each country and region. It will be activated (for
supported countries) through Windows Update and soware
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

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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 • Microso® Windows® 10 64-bit / 11 64-bit
Certica-
tions
• FCC, CE
• ErP/EuP ready (ErP/EuP ready power supply is required)
• CEC Tier II ready

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* 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 aect 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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B550M-C R2.0
1.3 Motherboard Layout

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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 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)

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B550M-C R2.0
1.4 I/O Panel
No. Description No. Description
1 USB 2.0 Ports (USB12) 7 USB 3.2 Gen2 Type-C Port
2 LAN RJ-45 Port* (USB31_TC_1)
3 Line In (Light Blue)** 8 Antenna Ports
4 Front Speaker (Lime)** 9 USB 3.2 Gen1 Ports (USB3_34)
5 Microphone (Pink)** 10 USB 3.2 Gen1 Ports (USB3_12)
6 USB 3.2 Gen2 Type-A Port 11 PS/2 Mouse/Keyboard Port
(USB31_TA_1) 12 HDMI Port
* ere are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.
Activity / Link LED Speed LED
Status Description Status Description
O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection
ACT/LINK LED
SPEED LED
LAN Port
11 910 6
7
12
1 2 4
85
3
** Function of the Audio Ports in 7.1-channel Conguration:
Port Function
Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out

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1.5 802.11ax Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz
Antennas
802.11ax Wi-Fi 6E + BT Module
is motherboard comes with an exclusive 802.11 a/b/g/n/ac/ax Wi-Fi 6E + BT
module that oers 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.
* e transmission speed may vary according to the environment.
* Wi-Fi 6E (6GHz band) will be supported by Microso® Windows® 11. e availability
will depend on the dierent regulation status of each country and region. It will be
activated (for supported countries) through Windows Update and soware updates
once available.
* A 6GHz compatible router is required for 6E functionality.

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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.

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is is a Micro ATX form factor motherboard. Before you install the motherboard,
study the conguration of your chassis to ensure that the motherboard ts 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 over-
tighten the screws! Doing so may damage the motherboard.
Chapter 2 Installation

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B550M-C R2.0
2.1 Installing the CPU
Unplug all power cables before installing the CPU.
2
1

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3

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B550M-C R2.0
2.2 Installing the CPU Fan and Heatsink
Aer 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.
Installing the CPU Box Cooler SR1
Please turn o the power or remove the power cord before changing a CPU or heatsink.
1
2