ASRock B850M Pro-A WiFi (90-MXBR9-A0UAYZ)

Name: ASRock B850M Pro-A WiFi 90-MXBR9-A0UAYZ
Brand: ASRock

Photos - Motherboard ASRock B850M Pro-A WiFi

Photos ₆

How to buy

from £115.00 up to £147.43

Compare prices ₁₂ →

When you make a purchase through links on our site, we may receive a affiliate commission.

ASRock B850M Pro-A WiFi

+ Wi-Fiwithout Wi-Fi

2025 Pro Wi-Fi M.2 cooling no backlight 2.5 Gbps

Towards:home / office

Form Factor:micro-ATX

Socket:AM5

Chipset:AMD B850

BIOS:Ami

RAM slots:DDR5 4 sl

RAM form factor:DIMM

RAM clock:8000 MHz

Sound (channels):7.1

Connectors:HDMI, M.2

Additional connectors:DisplayPort

Power connector:24-pin

Processor power:8+4-pin

All specifications

Specifications B850M Pro-A WiFi

Main
Features	for home/office
Socket	AM5
Form factor	micro-ATX
Power phases	11 / 8+2+1 /
VRM heatsink
Size (HxW)	244x244 mm


Chipset
Chipset	AMD B850
BIOS	Ami
UEFI BIOS


RAM
DDR5	4 slot(s)
Memory module	DIMM
Operation mode	2 channel
Max. clock frequency	8000 MHz
Max. memory	256 GB
XMP
EXPO support


Drive interface
SATA 3 (6Gbps)	4
M.2 connector	3
M.2	3xPCIe 4x
M.2 version	1x5.0, 2x4.0
M.2 SSD cooling
Integrated RAID controller


Expansion slots
PCIe 4x slots	1 pcs
PCIe 16x slots	1 pcs
PCIe support	5.0
Steel PCIe connectors


Internal connections
TPM connector
USB-A 2.0	2 pcs
USB-A 5Gbps	2 pcs
USB-C 5Gbps	1 pcs
ARGB LED strip	3
RGB LED strip	1

Video outputs
HDMI output
HDMI version	v2.1
DisplayPort
DisplayPort version	v.1.4


Integrated audio
Audiochip	Realtek ALC897
Sound (channels)	7.1


Network interfaces
Wi-Fi	Wi-Fi 6E (802.11ax)
Bluetooth	Bluetooth v5.2
LAN (RJ-45)	2.5 Gbps
LAN ports	1
LAN controller	Dragon RTL8125BG


External connections
USB-A 2.0	4 pcs
USB-A 5Gbps	2 pcs
USB-A 10Gbps	1 pcs
USB-C 10Gbps	1 pcs
BIOS FlashBack


Power connectors
Main power socket	24-pin
CPU power	8+4-pin
Fan power connectors	5
CPU Fan 4-pin	2
Chassis/Water Pump Fan 4-pin	3


Official Website	asrock.com
Added to E-Catalog	January 2025
P/N	90-MXBR9-A0UAYZ

E-Catalog UK editor, Motherboards

Valerii Lenko, edited 10.11.2025

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog ASRock 2026 - new arrivals, bestsellers, and the most relevant models ASRock.

How to choose a motherboard?Motherboard is the main part of any computer. Here's how to choose the right one for work, play and entertainment

Buy ASRock B850M Pro-A WiFi

All prices 12 →

When you make a purchase through links on our site, we may receive a affiliate commission.


	Asrock B850M Pro-A WiFi AMD B850 Socket AM5 micro ATX Pro-A series is designed for enhanced stability durability and efficiency it offers reliable performance... moreuser-friendly features and a streamlined aesthetic making it ideal for daily computing needs. - Supports AMD Socket AM5 Ryzen™ 9000 8000 and 7000 Series Processors - 8+2+1 Phase Power Design Dr.MOS for VCore+SOC+MISC - 4 x DDR5 DIMMs - Supports Dual Channel up to 8000+ (OC) - 1 PCIe 5.0 x16 1 PCIe 4.0 x4 - Graphics Output Options: 1 HDMI 1 DisplayPort - Realtek ALC897 7.1 CH HD Audio Codec - 1 Blazing M.2 (PCIe Gen5x4) - 2 Hyper M.2 (PCIe Gen4x4) - 4 SATA3 - 1 USB 3.2 Gen2 Type-C (Rear) - 1 USB 3.2 Gen2 Type-A (Rear) - 1 USB 3.2 Gen1 Type-C (Front) - 6 USB 3.2 Gen1 (2 Rear 4 Front) - 8 USB 2.0 (4 Rear 4 Front) - Realtek 2.5G LAN - 802.11axe WiFi 6E +Bluetooth - Supports BIOS Flashback Performance - 8+2+1 Power Phase Design - Featuring sturdy components and completely smooth power delivery to the CPU offering enhanced performance for gamers. - Dr. MOS - Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs it intelligently delivers higher current for each phase thus providing improved thermal result and superior performance. - Hi-Density Power Connector - CPU overclocking requires higher current. ASRock Hi-Density Power Connectors are designed to withstand higher currents compared to traditional CPU and ATX power connectors providing a more stable system and reducing the risk of fire during heavy overclocking. - 6 Layer PCB - The 6 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus it's able to support the latest memory modules with most extreme memory performance! - DDR5 XMP & EXPO Support - Derived from the “built for stable and reliable” designing concept ASRock does not compromise on any details. This motherboard is built with high quality materials enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles. Make sure the memory modules are Intel® XMP/AMD EXPO™ capable and overclocking can be made so affordable satisfying and absolutely no sweat at all. High Speed M.2 Solution - PCIe Gen5 Blazing M.2 - The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation with a breathtaking 128Gb/s transfer speed it is ready to unleash the full potential of future ultrafast SSDs. - Hyper M.2 Gen4 x4 - Supports PCI Express 4.0 M.2 SSDs it is capable of perform twice the speed compared to previous 3rd generation giving a Quzo.co.uk Delivery: to United Kingdom Report	£115.00 Buy in shop

	ASRock B850M Pro-A WiFi mATX Motherboard for AMD Socket AM5 CPUs 90-MXBR90-A0UAYZ Pro-A series is designed for enhanced stability, durability, and efficiency, it offers reliable performance, user-friendly fe... moreatures and a streamlined aesthetic, making it ideal for daily computing needs. CCLonline.com Delivery: to United Kingdom Report	£116.99 Buy in shop

	ASRock B850M Pro-A WiFi AMD Ryzen AM5 DDR5 mATX Motherboard - 90-MXBR9-A0UAYZ 90-MXBR9-A0UAYZ Awd-it.co.uk Delivery: to United Kingdom Report	£117.99 Buy in shop

	ASRock B850M Pro-A WiFi DDR5 PCIe 5.0 microATX Motherboard Scan.co.uk Delivery: to United Kingdom Report	£119.99 Buy in shop

	ASRock Asrock B850M Pro-A WiFi (Socket AM5) DDR5 mATX Motherboard 90-MXBR9-A0UAYZ Detailed Specification table { width: 100%; border-collapse: collapse; margi... moren: 20px 0; } th, td { padding: 10px; text-align: left; border: 1px solid #ddd; Detailed Specification Category Details Memory - Dual Channel DDR5 Memory Technology - 4 x DDR5 DIMM Slots - Supports DDR5 ECC/non-ECC, un-buffered memory up to 8000+(OC) - Max. capacity of system memory: 256GB - Supports Extreme Memory Profile (XMP) and EXTended Profiles for Overclocking (EXPO) memory modules Expansion Slot - 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode - 1 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode - 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module Graphics - Integrated AMD RDNA graphics (Actual support may vary by CPU) - 1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR, HDCP 2.3, and max. resolution up to 4K 120Hz - 1 x DisplayPort 1.4 with DSC (compressed), supports HDCP 2.3, and max. resolution up to 4K 120Hz Audio - 7.1 CH HD Audio (Realtek ALC897 Audio Codec) LAN - 2.5 Gigabit LAN 10/100/1000/2500 Mb/s (Dragon RTL8125BG) - Supports Dragon 2.5G LAN Software (Smart Auto Adjust Bandwidth Control, Visual UI, Optimized Default Setting for Game, Browser, and Streaming Modes, and User Customized Priority Control) Wireless LAN - 802.11axe Wi-Fi 6E Module - Supports IEEE 802.11a/b/g/n/ac/ax/axe - Supports Dual-Band 2x2 with extended 6GHz band (The Wi-Fi 6E module is supported by Microsoft® Windows® 11 only) - 2 antennas to support 2 (Transmit) x 2 (Receive) diversity technology - Supports Bluetooth 5.2 and 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) - 6 x USB 3.2 Gen1 Type-A (2 Rear, 4 Front) - 8 x USB 2.0 (4 Rear, 4 Front) - All USB ports support ESD Protection Rear Panel I/O - 2 x Antenna Ports - 1 x HDMI Port - 1 x DisplayPort 1.4 - 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) - 1 x USB 3.2 Gen2 Type-C Port - 2 x USB Overclockers.co.uk Delivery: to United Kingdom Report	£124.99 Buy in shop