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ASRock AMD B850 Pro RS AM5 DDR5 PCIe 5.0 ATX Motherboard
MotherboardsASRock

ASRock AMD B850 Pro RS AM5 DDR5 PCIe 5.0 ATX Motherboard

MPN: 90-MXBQK0-A0UAYZ

Key specifications

SocketAM5
Form factorATX
ChipsetAMD B850
Memory typeDDR5
M.2 slots5
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-MXBQK0-A0UAYZ
Gtin
4711581490161

Additional Specifications

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

Core Specifications

Edition
B850 Pro RS
Form Factor
ATX
Socket
AM5
Chipset
AMD B850

External Connectivity

Network Interface Type
Wired 2.5 Gigabit LAN
Network Chip Modules
1 x Realtek RTL8125BG
Rear I O Connectors
1 x BIOS Flashback Button 1 x Front Speaker Out 1 x HDMI 2.1 1 x Line In 1 x Mic-In 1 x RJ-45 6 x USB 2.0 4 x USB 3.2 Gen1 Type-A 1 x USB 3.2 Gen1 Type-C / DP 1 x USB 3.2 Gen2 Type-C

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
HDMI 2.1 USB Type-C (DisplayPort)

Internal Connectivity

Expansion Slots
1 x M.2 Key E (Supports Wi-Fi modules) 1 x M.2, 22-30/42/60/80, PCIe Gen4x4 1 x M.2, 22-80, PCIe Gen3x4 1 x M.2, 22-80, PCIe Gen4x4 1 x M.2, 22-80, PCIe Gen5x4 1 x PCIe 4.0 x16 (x4 Bandwidth) 1 x PCIe 5.0 x16 4 x SATA 6GB/s
Sata Support
N/A
Raid Support Via
-
Storage Mode Support
RAID 0 RAID 1 RAID 10
Internal I O
1 x 24-pin (Power) 1 x 4-pin AIO Pump Connector 4 x 4-pin CHA_FAN connector 2 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 2 x USB 3.2 Gen1 Header 1 x USB 3.2 Gen2x2 Connector

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