We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Micro-ATX motherboard, dark PCB with silver heatsinks, AM5 socket, four DDR5 slots, two M.2 covers, rear I/O shield

MSI

MSI PRO B850M-A WIFI AMD motherboard

SKU CH-975D-R9GKM MPN PRO B850M-A WIFI

Micro-ATX board for AM5 Ryzen 7000, 8000 and 9000 CPUs with DDR5, PCIe 5.0, WiFI 7, Bluetooth 5.4 and 5G LAN

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorMicro ATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memory4 DIMMs, Dual Channel DDR5 – 8200+ MT/s (OC)
  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5 socket
  • DDR5 memory up to 8200 MT/s over four DIMM slots for high bandwidth
  • PCIe 5.0 x16 and M.2 Gen5 at 128 Gbps enable fast GPU and storage
  • WiFI 7 and Bluetooth 5.4 plus Realtek 8126 5G LAN for modern connectivity
  • EZ M.2 Shield Frozr II and extended heatsinks keep thermals under control

Socket AM5 DDR5 motherboard

The MSI PRO B850M-A WIFI is a Micro-ATX board built on the AMD B850 chipset for Ryzen 7000, 8000 and 9000 series processors. It delivers four DDR5 slots supporting 8200 MT/s overclocked speeds in dual-channel mode. The board targets creators and professionals who need current-generation connectivity in a compact form factor.

PCIe 5.0 M.2 slot at 128 Gbps

The primary M.2 socket runs at Gen5 x4 bandwidth, providing 128 Gbps of throughput for the system drive. A second M.2 slot operates at Gen4 x4 64 Gbps for additional storage. This configuration decides whether the board matches a build that requires maximum SSD performance on the primary slot.

5G LAN Wi-FI 7 Bluetooth 5.4

Networking includes a Realtek 8126 5G LAN port, Wi-FI 7 and Bluetooth 5.4 for modern wireless peripherals. Video output is limited to a single HDMI port, so a discrete graphics card is required for display. Four SATA 6Gbps ports and three PCIe slots (5.0 x16, 4.0 x4, 3.0 x1) complete the expansion options.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $135.99
Cheaper than about 66% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMSI
Model namePRO B850M-A WIFI
Part numberPRO B850M-A WIFI
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memory4 DIMMs, Dual Channel DDR5 – 8200+ MT/s (OC)
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots1 x M.2 Gen5 x4 128 Gbit/s slot,
1 x M.2 Gen4 x4 64 Gbit/s slot,
Audio & video
Audio chipALC897
Sound channels8-Channel (7.1) HD Audio with Audio Boost
Connectivity
Ethernet controllerRealtek®
8126 5G LAN
Wi-Fi standardWiFI 7
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slots1 x PCI Express 5.0 x16
PCIe 4.0 x16 slots1 x PCIe 4.0 x4 slot
PCIe 3.0 x16 slots1 x PCIe 3.0 x1 slot
HDMI ports1 x HDMI
Ethernet port1 x RJ45
DisplayPort connectors1 x DisplayPort
USB 3.1 ports3 x USB 10 Gbit/s Type-A
3 x USB 5 Gbit/s Type-A
USB-C ports2 x USB 10 Gbit/s Type-C
Audio jacks8-Channel(7.1)HD Audio with Audio Boost
Onboard USB headers4x USB 2.0
2x USB 5 Gbit/s Type-A
1x USB 10 Gbit/s type-C
Size & build
Form factorMicro ATX
Shipping weight1.25 kg
Package size279 × 277 × 79 mm

Questions about this item

How does DDR5 at 8200 MT/s behave once the board is built?

The memory controller runs dual-channel DDR5 and the BIOS exposes an 8200+ MT/s overclock profile; actual speed depends on the CPU memory controller and the DIMM kit you install.

What does the PCIe 5.0 x16 slot and the Gen5 M.2 cap at in practice?

The primary x16 slot is wired for PCIe 5.0 and the top M.2 runs at Gen5 x4 (128 Gbps); the second M.2 is Gen4 x4 (64 Gbps) and the remaining slots are Gen4 x4 and Gen3 x1.

What physical clearance does the Micro-ATX board and AM5 socket need?

The board follows the Micro-ATX form factor with an AM5 socket and standard mounting holes, so it fits any chassis that lists Micro-ATX support and provides the AM5 keep-out zone.

More in Motherboards for AMD CPUs

Similar items