ASRock B850M Pro-A AMD motherboard AM5 Micro ATX

AM5 Micro ATX for Ryzen 7000 to 9000

The ASRock B850M Pro-A is a Micro ATX motherboard built on the AMD B850 chipset for socket AM5 processors. It accepts Ryzen 7000, 8000 and 9000 series CPUs and provides four DDR5 DIMM slots with dual-channel support up to 256 GB. An 8+2+1 phase Dr.MOS power design and a six-layer PCB deliver stable voltage regulation for daily workloads and moderate overclocking.

Suits compact builds needing PCIe 5.0 graphics and

This board fits users who want a smaller chassis without sacrificing a full-length PCIe 5.0 x16 slot or a CPU-attached M.2 socket running at Gen5x4 speeds. It also offers two chipset Gen4x4 M.2 slots, four SATA 6 Gb/s ports and 7.1-channel Realtek ALC897 audio. Builders requiring more than two M.2 drives directly from the CPU or additional PCIe expansion slots should consider larger ATX models.

Single CPU-attached PCIe 5.0 M.2 socket at 128 Gb/s

The primary M.2 socket (M2_1) connects directly to the Ryzen CPU and operates at PCIe 5.0 x4, providing up to 128 Gb/s bandwidth for a 2280 NVMe drive. The two chipset M.2 sockets run at PCIe 4.0 x4 (64 Gb/s each). This topology decides whether your fastest system drive gets the full Gen5 link or must share the chipset pool.