ASRock B850M Pro-A (90-MXBR8-A0UAYZ)

Name: ASRock B850M Pro-A 90-MXBR8-A0UAYZ
Brand: ASRock
Price: 120.25 GBP
Availability: InStock

ASRock B850M Pro-A

+ Wi-Fiwithout Wi-Fi

2025 PRO (home/office/gaming)M.2 cooling no backlight 2.5 Gbps

Towards:home / office

Form Factor:micro-ATX

Socket:AMD 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

Compact microATX motherboard based on the AMD B850 chipset. It belongs to the mid-range class and is part of the ASRock Pro lineup for 2025, offering a practical solution for creating compact mid-level systems with modern expansion capabilities at an affordable price. With support for socket AM5, it ensures full compatibility with Ryzen 9000/8000/7000 series processors, while the 8+2+1-phase power system with Dr.MOS transistors is perfect for installing mid-budget processors like Ryzen 5/Ryzen 7 under moderate loads.

Notable features of the ASRock B850M Pro-A include support for DDR5 memory with overclocking capabilities in four DIMM slots using Dual Channel technology, which enhances bandwidth. The board is equipped with four slots for DDR5 RAM with a maximum frequency exceeding 8000 MHz and supports AMD EXPO profiles, allowing the user to quickly and easily overclock memory to optimal levels.

The storage system includes one M.2 Gen5 slot for high-speed NVMe drives and two M.2 Gen4 slots for mid-range SSDs, as well as four SATA3 ports for connecting traditional drives. As for connectivity, the board features one PCI-E 5.0 x16 slot for a graphics card and an additional PCI-E 4.0 slot for expansion cards. Video outputs include HDMI and DisplayPort connectors. Additional features include a Realtek 2.5G LAN controller for high-speed wired connection and an M.2 Key E slot for Wi-Fi module installation. An alternative model with pre-installed Wi-Fi is also available in the market.

All specifications

Specifications B850M Pro-A

Main
Features	for home/office
Socket	AMD 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	3xPCI-E 4x
M.2 version	1x5.0, 2x4.0
M.2 SSD cooling
Integrated RAID controller


Expansion slots
PCI-E 4x slots	1
PCI-E 16x slots	1
PCI Express	5.0
Steel PCI-E connectors

Internal connections
TPM connector
USB A 2.0	2 pcs
USB A 5Gbps (3.2 gen1)	2 pcs
USB C 5Gbps (3.2 gen1)	1 pcs
ARGB LED strip	3
RGB LED strip	1


Video outputs
HDMI output
HDMI version	v.2.1
DisplayPort
DisplayPort version	v.1.4


Integrated audio
Audiochip	Realtek ALC897
Sound (channels)	7.1


Network interfaces
LAN (RJ-45)	2.5 Gbps
LAN ports	1
LAN controller	Dragon RTL8125BG


External connections
USB 2.0	4
USB A 5Gbps (3.2 gen1)	2 pcs
USB A 10Gbps (3.2 gen2)	1 pcs
USB C 10Gbps (3.2 gen2)	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-MXBR8-A0UAYZ

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.

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