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ASUS PRIME B850M-A WIFI micro-ATX motherboard with silver heatsinks and black PCB

ASUS

ASUS PRIME B850M-A WIFI AMD motherboard

SKU CH-XT89-EXJF2

Micro-ATX AM5 board with DDR5 8000+ MT/s support, PCIe 5.0 slot, Wi-Fi 6E and 2.5 Gb Ethernet

  • CPU socketAM5
  • Stable power delivery with 8+2+1 power modules and Digi+ VRM control
  • High-speed DDR5 memory up to 8000 MT/s overclocked
  • Effective cooling via VRM heatsinks, M.2 heatsink and PWM fan headers
  • Fast wired networking with Realtek 2.5 Gb Ethernet
  • RGB personalisation through Aura Sync and addressable ARGB header

Compact AM5 Platform

The ASUS PRIME B850M-A WIFI is a micro-ATX motherboard built for AMD AM5 processors. It provides DDR5 memory support and PCIe 5.0 readiness in a compact form factor. Integrated Wi-Fi 6E and Realtek 2.5 Gb Ethernet handle networking. Video outputs include dual DisplayPort and HDMI for processor graphics.

Targeted Build Profile

This board suits builders assembling a space-efficient AM5 system with modern connectivity and room for multiple storage drives. It is not for users requiring extended ATX expansion slots or workstation-class multi-GPU configurations. Buyers needing more than three M.2 sockets should consider larger form factors.

DDR5 Speed Ceiling

Memory overclocking headroom reaches DDR5 8000 MT/s, setting the practical performance limit for compatible kits. The 8+2+1 power phase design and 6-layer PCB deliver stable voltage for sustained high-frequency operation. This specification determines whether the board matches your memory performance targets.

How it compares

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

Price $187.99
Cheaper than about 55% of the 1,906 comparable items (median $224.49).

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Specifications

Processor
CPU socketAM5

Questions about this item

Will my existing AM5 cooler fit the VRM heatsinks and one-piece pump connector on this B850 board?

The board uses standard AM5 mounting, so any cooler rated for AM5 will clear the VRM heatsinks and can use the dedicated pump header for liquid cooling.

How do I confirm the DDR5 memory is running at the advertised 8000 MT/s after I build the system?

Enter the UEFI BIOS and check the memory frequency readout, or use a hardware monitoring tool in the OS to verify the DDR5 speed matches the overclocked target.

Does the box include the Wi-Fi 6E antenna and M.2 mounting screws, or do I need to buy them separately?

The motherboard ships with the Wi-Fi 6E antenna and M.2 screws included, so no extra parts are required for wireless or storage installation.

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