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ASRock B550M/AC AM4 AMD B550 SATA 6Gb/s Micro ATX AMD Motherboard

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  • BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU
  • AMD B550
  • Supports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen Processors
  • 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 (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
🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available
Specs
Reviews

Learn more about the ASRock B550M/AC

Model
Brand ASRock
Model B550M/AC
Supported CPU
CPU Socket Type AM4
CPU Type Supports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen Processors*
* Not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G.
* BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASRock website for CPU support list.
Chipsets
Chipset AMD B550
Memory
Number of Memory Slots 4x288pin (DDR4)
Memory Standard 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 (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*
* Please refer to Memory Support List on ASRock's website for more information. (http://www.asrock.com/)
Maximum Memory Supported 128GB
Channel Supported Dual Channel
Expansion Slots
PCI Express 4.0 x16 AMD Ryzen series CPUs (Matisse):
PCIE1: Gen4x16 mode

AMD Ryzen series APUs (Renoir):
PCIE1: Gen3x16 mode

* Supports NVMe SSD as boot disks
PCI Express 3.0 x16 AMD Ryzen series CPUs (Matisse):
PCIE3: Gen3 x4 mode
AMD Ryzen series APUs (Renoir):
PCIE3: Gen3 x4 mode

* Supports NVMe SSD as boot disks
PCI Express x1 1 x PCI Express 3.0 x1 Slot
Other Slots 1 x M.2 Socket (Key E) with the bundled WiFi-802.11ac module
Storage Devices
SATA 6Gb/s 4 x SATA3 6.0Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug
M.2 1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 PCI Express module up to Gen4x4 (64Gb/s) (with Matisse) or Gen3x4 (32Gb/s) (with Renoir)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
SATA RAID 0/1/10
Onboard Video
Onboard Video Chipset Integrated AMD Radeon 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
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
Supports 4K Ultra HD (UHD) playback with HDMI 2.1 Port
Supports Microsoft PlayReady
Onboard Audio
Audio Chipset Realtek ALC1200
Audio Channels 7.1 Channels
Onboard LAN
LAN Chipset Realtek RTL8111H
Max LAN Speed 1Gbps
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
Bluetooth Supports Bluetooth 4.2+ High speed class II
Rear Panel Ports
Back I/O Ports 2 x Antenna Ports
1 x PS/2 Mouse/Keyboard Port
1 x HDMI Port
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
Internal I/O Connectors
Onboard USB 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)
Other Connectors 1 x COM Port Header
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_FAN4/WP can auto detect if 3-pin or 4-pin fan is in use.
1 x Front Panel Audio Connector
Physical Spec
Form Factor Micro ATX
LED Lighting RGB
Dimensions (W x L) 9.6" x 9.6"
Power Pin 1 x 24-pin ATX Power Connector
1 x 8-pin 12V Power Connector
Windows 11 Compatibility
Windows 11 Supported
Features
Features Unique Feature:
ASRock Super Alloy
- XXL Aluminum Alloy Heatsink
- Premium 50A Power Choke
- Sapphire Black PCB
- High Density Glass Fabric PCB
- 2oz Copper PCB
Intel 802.11ac WiFi
ASRock Hyper M.2 (PCIe Gen4x4)
ASRock POST Status Checker (PSC)
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Shop

BIOS Feature:
- 256MB 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, VPPM, +1.8VSB Voltage Multi-adjustment

Support CD:
- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar

Software and UEFI:
Software
- ASRock Motherboard Utility (A-Tuning)
- ASRock Polychrome SYNC
- ASRock XFast LAN
* These utilities can be downloaded from ASRock Live Update & APP Shop.
UEFI
- ASRock Full HD UEFI
- ASRock Instant Flash

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 temperature): 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

OS:
- Microsoft Windows 10 64-bit

Certifications:
- FCC, CE
- ErP/EuP ready (ErP/EuP ready power supply is required)
Packaging
Package Contents Accessories:
- Quick Installation Guide, Support CD, I/O Shield
- 2 x SATA Data Cables
- 2 x ASRock WiFi 2.4/5 GHz Antennas
- 1 x Screw for M.2 Socket
Additional Information
Date First Available September 21, 2020

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Return Policies

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