Asrock B850M PRO-A Gaming Motherboard, AMD B850, AM5, Micro ATX, DDR5, PCIe 5.0

AsRock B850 Micro ATX AMD Gaming Motherboard

The ASRock B850M PRO-A delivers high-performance gaming on a compact Micro ATX platform. Built for AMD Ryzen 7000 series processors with AM5 socket compatibility, this motherboard harnesses DDR5 memory support for superior bandwidth and PCIe 5.0 connectivity for next-generation graphics cards and storage devices. The B850 chipset ensures robust power delivery and advanced features tailored for gaming workloads, while the smaller form factor suits space-conscious builds without compromising performance or expandability.

Specifications

Motherboard Type: Desktop

Form Factor: Micro ATX

Socket: AMD AM5

Chipset: AMD B850

RAM Technology
DDR5 (Dual Channel)
ECC and Non-ECC Un-buffered DIMM
Supports XMP & EXPO

RAM Slots: 4 x DIMM

RAM Speeds: Up to 8000+(OC)

Maximum Memory: 256GB

Graphics
Integrated Graphics
Graphics specifications may vary between CPU types

Graphics Ports
1 x HDMI
1 x DisplayPort

PCI/PCI Express
Ryzen 9000 & 7000 Series CPUs:
1 x PCIe 5.0 x16
1 x PCIe 4.0 x4

Ryzen 8000 Series CPUs:
1 x PCIe 4.0 x8/x4
1 x PCIe 4.0 x4

Storage
4 x SATA III
3 x M.2
Ryzen 9000 & 7000 Series CPUs: M.2_1 (2280) - PCIe 5.0 x4
Ryzen 8000 Series CPUs: M.2_1 (2280) - PCIe 4.0 x4
AMD B850 Chipset: M.2_2 (2280) - PCIe 4.0 x4, M.2_3 (2280) - PCIe 4.0 x4/x2

RAID
Supports RAID 0, 1 and 10 for SATA storage devices
Supports RAID 0, 1 and 10 for M.2 NVMe storage devices*
* Requires additional M.2 NVMe expansion cards to support RAID 10

Wireless: No

LAN: 2.5GB LAN

Audio: 7.1 CH HD Audio (Realtek ALC897 Audio Codec)

USB Ports Supported
Rear:
1 x USB 10Gbps Type-C (Rear)
1 x USB 10Gbps Type-A
2 x USB 5Gbps Type-A
4 x USB 2.0

Front:
1 x USB 5Gbps Type-C
4 x USB 5Gbps Type-A
4 x USB 2.0

Back Panel I/O Ports
2 x Antenna Mounting Points
1 x HDMI
1 x DisplayPort 1.4
1 x USB 3.2 Gen2 Type-A (10 Gb/s)
1 x USB 3.2 Gen2 Type-C
2 x USB 3.2 Gen1
4 x USB 2.0
1 x RJ-45 LAN
1 x BIOS Flashback Button
HD Audio Jacks

Internal I/O Connectors
1 x SPI TPM
1 x Power LED and Speaker
1 x RGB LED
3 x Addressable LED
2 x CPU Fan
3 x Chassis Fan
1 x 24 pin ATX
1 x 8 pin 12V
1 x 4 pin 12V
1 x Front Panel Audio
2 x USB 2.0
2 x USB 3.2 Gen1 1 x Front Panel Type-C USB 3.2 Gen1

Accessories
1 x I/O Shield
2 x SATA Data Cables
1 x Screw for M.2 Socket