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Micro-ATX motherboard with black PCB and silver heatsinks

MSI

MSI B850M GAMING PLUS WIFI6E AMD motherboard

SKU CH-AMYB-STNXS

Micro-ATX AM5 board with Wi-Fi 6E, 2.5 GbE LAN, PCIe 5.0 M.2 and a 10+2+1 Duet Rail power design for Ryzen 9000 series CPUs

  • CPU socketAM5
  • ChipsetAMD B850
  • Wi-Fi 6E and 2.5G LAN deliver fast, low-latency networking for online play
  • 10+2+1 Duet Rail Power System with dual 8-pin connectors sustains heavy gaming loads
  • DDR5 memory support up to 8200 MT/s overclocked boosts system responsiveness
  • PCIe 5.0 M.2 slot enables ultra-fast storage for quick game loading
  • AI Engine, AI LAN Manager and Frozr AI Cooling automatically optimise performance, networking and thermals

Micro-ATX board for Ryzen AM5 builds

The MSI B850M GAMING PLUS WIFI6E is a micro-ATX motherboard built on the AMD B850 chipset for socket AM5 processors. It provides a 10+2+1 Duet Rail power system with dual 8-pin CPU connectors and a 6-layer PCB using 2 oz copper. Connectivity includes Wi-Fi 6E, 2.5G LAN and a PCIe 5.0 M.2 slot.

Gamers wanting AI tuning

This board suits builders who want AI-assisted BIOS and software optimisation, Frozr AI Cooling and a high-phase power design in a smaller chassis. It is not for users who require a larger form factor with more expansion slots or additional rear USB ports beyond the four USB 2.0 connections listed.

PCIe 5.0 M.2 slot for fastest storage

The single specification that decides fit is the PCIe 5.0 M.2 slot, which enables the highest sequential speeds available for compatible solid-state drives. If your build does not need that interface, a board with only PCIe 4.0 storage may meet your needs at lower cost.

How it compares

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

Price $219.99
Typical for this category: the median of 1,906 items is $224.49.

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Specifications

Processor
CPU socketAM5
ChipsetAMD B850

Questions about this item

What size case and power connectors does the Micro-ATX B850M GAMING PLUS WIFI6E need?

The board uses the Micro-ATX form factor and requires both 8-pin CPU power connectors for the 10+2+1 Duet Rail Power System.

Which slot should I use first when adding a PCIe 5.0 M.2 drive, and what BIOS step enables it?

Install the drive in the primary PCIe 5.0 M.2 slot, then enter BIOS and enable the PCIe 5.0 link speed for that slot.

When should the chipset fan header be checked or the thermal pad replaced on this B850 board?

Inspect the chipset fan header during any major teardown; replace the thermal pad if temperatures rise above normal after several years of 24/7 gaming loads.

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