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Green micro-ATX motherboard with large silver heatsinks and black PCB

ASUS

ASUS TUF Gaming B850M-PLUS WiFi AMD AM5 B850 mATX Motherboard

SKU CH-9FJG-PYK1X

An AMD AM5 mATX board with 14+2+1 80A DrMOS stages, DDR5 support, one PCIe 5.0 and two PCIe 4.0 M.2 slots, Wi-Fi 6E, 2.5Gb LAN, rear USB 20Gbps Type-C and front USB 10Gbps Type-C

  • CPU Socket TypeAM5
  • Stable power for heavy workloads backed by 14+2+1 80A DrMOS stages and 8-layer PCB
  • Ready for AMD Ryzen 9000 8000 7000 series processors with AM5 socket support
  • Fast storage expansion via one PCIe 5.0 and two PCIe 4.0 M.2 slots with large heatsink
  • High-speed networking and peripherals with Wi-Fi 6E 2.5Gb LAN USB 20Gbps and 10Gbps Type-C ports
  • Future-ready platform for AI computing with PCIe 5.0 x16 graphics slot and DDR5 memory support

Ready for AMD Ryzen 9000, 8000 and 7000 series

This mATX motherboard uses the AMD B850 chipset and AM5 socket to support Ryzen 9000, 8000 and 7000 series desktop processors. It delivers a 14+2+1 80A DrMOS power design on an 8-layer PCB with dual 8-pin ProCool connectors for stable delivery. DDR5 memory, PCIe 5.0 graphics and storage, Wi-Fi 6E and 2.5Gb LAN are included for modern builds.

Suits builders who need three M.2 slots

The board provides one PCIe 5.0 M.2 slot and two PCIe 4.0 M.2 slots, all covered by a large heatsink. Rear I/O includes a USB 20Gbps Type-C port and a front-panel USB 10Gbps Type-C header. Buyers who require four or more M.2 drives should consider a different platform or add-in cards.

Deciding spec: one PCIe 5.0 M.2 slot

This configuration gives the fastest available slot for an OS drive and two additional high-speed slots for games or scratch disks. If your workflow demands more than three onboard M.2 devices, this board will not meet that need.

Highlights

  • Stable power for heavy workloads backed by 14+2+1 80A DrMOS stages and 8-layer PCB
  • Ready for AMD Ryzen 9000 8000 7000 series processors with AM5 socket support
  • Fast storage expansion via one PCIe 5.0 and two PCIe 4.0 M.2 slots with large heatsink
  • High-speed networking and peripherals with Wi-Fi 6E 2.5Gb LAN USB 20Gbps and 10Gbps Type-C ports
  • Future-ready platform for AI computing with PCIe 5.0 x16 graphics slot and DDR5 memory support

Specifications

CPU Socket TypeAM5

Questions about this item

How much heat and power draw should I expect from the 14+2+1 80A DrMOS power stages when the board runs all day?

The 14+2+1 80A DrMOS stages with alloy chokes and durable capacitors on an 8-layer PCB deliver stable power to Ryzen 7000, 8000 and 9000 series CPUs, keeping thermals controlled during sustained workloads.

Which components must I already own — such as DDR5 memory and an AM5 cooler — for this motherboard to function?

You need an AMD Ryzen 7000, 8000 or 9000 series processor, DDR5 modules, an AM5-compatible CPU cooler, a PSU with 8+8 pin ProCool connectors, and a chassis that fits mATX.

Will my existing PCIe 4.0 M.2 SSDs and 2.5Gb Ethernet switch work at full speed with the PCIe 5.0 x16 slot and Realtek 2.5Gb LAN?

Yes, the two PCIe 4.0 M.2 slots run your current drives at their rated speed, the PCIe 5.0 x16 slot is backward compatible, and the Realtek 2.5Gb LAN matches your switch.

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