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Micro-ATX AM5 motherboard with black PCB and silver heatsinks

ASRock

ASRock B850M-X R2.0 AMD motherboard AM5 DDR5 8200+ OC PCIe 5.0 2.5G LAN

SKU CH-27GW-NHE90 MPN B850M-X R2.0

Micro-ATX AM5 board with dual-channel DDR5 up to 8200 OC, PCIe 5.0 graphics slot, 2.5 Gbps LAN and USB 3.2 Type-C

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorMicro ATX
  • CPU socketAM5
  • Memory slot count2 × 288pin (DDR5)
  • Max supported RAM128 GB
  • Supports Ryzen 7000, 8000 and 9000 series CPUs on AM5 socket
  • Dual-channel DDR5 memory up to 8200 OC with AMD EXPO profiles
  • PCIe 5.0 x16 slot plus Gen5 M.2 for high-speed graphics and storage
  • 5 Gbps LAN and USB 3.2 Gen1 Type-C for fast wired connectivity
  • Micro ATX form factor with 128 GB maximum memory capacity

AM5 DDR5 Micro-ATX board for Ryzen 7000 8000 9000

The ASRock B850M-X R2.0 is a Micro-ATX motherboard built on the AMD B850 chipset with an AM5 socket. It accepts Ryzen 7000, 8000 and 9000 series processors and runs dual-channel DDR5 up to 8200+ OC via AMD EXPO. The board includes one PCIe 5.0 x16 slot, one PCIe 4.0 x16 slot, three legacy PCI slots, dual M.2 sockets, 2.5G LAN and USB 3.2 Type-C ports.

Builders needing PCIe 5.0

This board suits builders who want a PCIe 5.0 graphics slot and DDR5 overclocking headroom in a Micro-ATX form factor. It also fits users who need 2.5G LAN and front-panel USB 3.2 Type-C without paying for a larger ATX platform. Buyers requiring four DDR5 slots, integrated Wi-Fi, extensive RGB lighting or a full-size ATX layout should look at other models.

Dual-channel DDR5 up to 8200+ OC

The memory subsystem tops out at 128 GB across two 288-pin slots running dual-channel DDR5 with AMD EXPO profiles reaching 8200+ OC. That ceiling decides whether the board can feed a given CPU and workload; if a build demands more slots or higher validated speeds, this is not the right part.

How it compares

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

Price $86.99
Cheaper than about 80% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASRock
Model nameB850M-X R2.0
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count2 × 288pin (DDR5)
Max supported RAM128 GB
Memory channelsDual Channel
Memory profilesAMD EXPO
Connectivity
Maximum network speed2.5 Gbit/s
Ports & slots
PCIe 5.0 x16 slots1 x PCI Express 5.0 x16
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16
PCI slots3 x PCI Slots
Size & build
Form factorMicro ATX
Shipping weight1.18 kg
Package size298 × 265 × 61 mm
Compatibility
Windows 11 supportSupported
More details
LightingNone RGB

Questions about this item

Does the box include any DDR5 modules or a Wi-Fi card, or must they be purchased separately?

The board ships without DDR5 memory or a Wi-Fi module. You will need to buy DDR5 DIMMs and, if you want wireless, a compatible M.2 Key E card separately.

Should I pick a DDR5 kit rated at 8200 MT/s or a slower EXPO kit for this board?

The board supports DDR5 up to 8200+ MT/s when overclocked via AMD EXPO. A kit rated at 8200 MT/s will run at that speed with an EXPO profile; slower EXPO kits will run at their rated speed and are easier to stabilise.

What does the PCIe 5.0 x16 slot actually deliver when a Ryzen 9000 CPU is installed?

With a Ryzen 9000 series processor the primary x16 slot operates at PCIe 5.0, giving a graphics card or Gen5 SSD the full 5.0 bandwidth.

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