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ASRock B850M Pro-A WiFi DDR5 PCIe 5.0 microATX Motherboard
MotherboardsASRock

ASRock B850M Pro-A WiFi DDR5 PCIe 5.0 microATX Motherboard

MPN: 90-MXBR90-A0UAYZ

Key specifications

SocketAM5
Form factormATX
ChipsetAMD B850
Memory typeDDR5
M.2 slots4
Max Memory256 GB
Best indexed price
£130.41GBP
Indexed 16 Mar 2026 — verify at retailer. How we get prices

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eBay UK£130.41
Indexed 16 Mar 2026New · seller quzo_uk
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Full Specifications31 fields

Additional Information

Model Number
90-MXBR90-A0UAYZ
Gtin
4711581490376

Additional Specifications

Water Cooled
No
Cooling
Passive Heatsinks
Qpi Speed
N/A
Dimensions
244 x 244 mm
Note
-

Core Specifications

Edition
B850M Pro-A WiFi
Form Factor
MicroATX
Socket
AM5
Chipset
AMD B850

External Connectivity

Network Interface Type
802.11ax Wi-Fi 6E LAN Wired 2.5 Gigabit LAN
Network Chip Modules
1 x 802.11ax WiFi 6E + BT5.2 1 x Realtek RTL8125BG
Rear I O Connectors
1 x BIOS Flashback Button 1 x DisplayPort 1.4 1 x Front Speaker Out 1 x HDMI 2.1 1 x Line In 1 x Mic-In 1 x RJ-45 4 x USB 2.0 1 x USB 3.1 Gen2 Type-A 2 x USB 3.2 Gen1 Type-A 1 x USB 3.2 Gen2 Type-C 2 x WiFi Antenna connectors

Graphics Support

Primary Gpu Interface
PCIe 5.0 (x16)
Nvidia Sli Support
N/A
Amd Crossfire Support
N/A
Integrated Graphics
Discrete GPU Required for Graphics Output
On Board Graphics Connectors
DisplayPort 1.4 (DSC) HDMI 2.1

Internal Connectivity

Expansion Slots
1 x M.2 Key E 1 x M.2 Key E (Supports Wi-Fi modules) 2 x M.2, 22-80, PCIe Gen4x4 1 x M.2, 22-80, PCIe Gen5x4 1 x PCIe 4.0 x4 1 x PCIe 5.0 x16 4 x SATA 6GB/s
Sata Support
SATA3
Raid Support Via
SATA3 / M.2
Storage Mode Support
RAID 0 RAID 1 RAID 10
Internal I O
1 x 24-pin (Power) 1 x 4-pin (Power) 3 x 4-pin CHA_FAN connector 1 x 4-pin Water Pump Connector 1 x 8-pin (Power) 3 x Addressable Digital RGB Header 2 x CPU Fan Connector 1 x Front Panel Audio Header 1 x Power LED / Speaker Header 1 x RGB Header 1 x TPM (SPI_TPM) header 2 x USB 2.0 Header 1 x USB 3.2 Gen1 Header 1 x USB 3.2 Gen1 Type-C Front Panel Header

RAM Memory Support

Memory Type
DDR5
Memory Channel
Dual (2)
Memory Type Ecc
ECC/Non-ECC
Memory Type R U
UDIMM (Unbuffered)
Memory Speed Mhz
DDR5 - 8000(OC)
Max Memory Capacity
256GB

General

Audio
7.1 Channel HD Audio