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 board with grey steel heatsinks and silver accents

ASRock

ASRock B850M Steel Legend WiFi AMD motherboard

SKU CH-MPD0-VHMQ8 MPN B850M Steel Legend WiFi

Micro-ATX AM5 board with 12+2+1 power phases, PCIe 5.0 x16, three M.2 sockets, Dragon RTL8125BG LAN and Wi-Fi

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorMicro ATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to 8000+(OC)

Model B850M Steel Legend WiFi

Show 4 more
  • Supports Ryzen 9000, 8000 and 7000 series processors on AM5 socket
  • 12+2+1 phase power design with Dr.MOS for stable CPU delivery
  • Four DDR5 slots up to 8000 MT/s and 256 GB maximum capacity
  • One PCIe 5.0 x16 slot plus three M.2 sockets including Gen5x4
  • Realtek ALC1220 7.1 channel audio with Nahimic enhancement and Dragon RTL8125BG LAN

AM5 Micro ATX Platform

The ASRock B850M Steel Legend WiFi is a Micro ATX motherboard built for AMD Socket AM5. It accepts Ryzen 7000, 8000 and 9000 series processors and delivers a 12+2+1 phase Dr.MOS power design. Four DDR5 slots support up to 256 GB of memory with AMD EXPO and Intel XMP 3.0 profiles.

PCIe 5.0 Graphics And Gen5 M.2

The board provides one PCIe 5.0 x16 slot that runs at Gen5 x16 with 9000 and 7000 series CPUs, dropping to Gen4 x8 or x4 with 8000 series parts. A CPU-attached Blazing M.2 socket operates at PCIe Gen5 x4 (128 Gb/s), while chipset M.2 sockets add Gen4 x4 and Gen4 x2 options alongside four SATA 6 Gb/s ports.

Mainstream Enthusiast Focus

This board suits builders who want strong VRM cooling, high-speed DDR5 and Gen5 storage in a compact form factor. Users needing more than two full-size PCIe slots, additional 10 GbE ports or a larger ATX layout should consider a different chipset or form factor.

How it compares

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

Price $142.99
Cheaper than about 64% 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 nameASRock
Model nameB850M STEEL LEGEND WIFI
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to 8000+(OC)
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesAMD EXPO / Intel XMP 3.0
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
Audio & video
Audio chipRealtek ALC1220
Sound channels7.1 Channels
Connectivity
Ethernet controllerDragon RTL8125BG
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 4.0 x16 slots1 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode*
Rear panel ports2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
2 x USB 3.2 Gen1 Ports
4 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
HD Audio Jacks: Line in / Front Speaker / Microphone
* USB32_23 are Lightning Gaming Ports
Onboard USB headers2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen1 Header
Power
Power connectors1 × 24 pin ATX Power Connector (Hi-Density Power Connector)
1 × 8 pin 12 V Power Connector (Hi-Density Power Connector)
1 × 4 pin 12 V Power Connector (Hi-Density Power Connector)
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Shipping weight1.20 kg
Package size305 × 267 × 64 mm
Compatibility
Windows 11 supportWindows OS 10 64-bit / 11 64-bit
In the box
In the box2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
1 x Thermistor Cable
2 x Screws for M.2 Sockets
1 x Standoff for M.2 Socket
More details
BIOS256Mb AMI UEFI Legal BIOS with GUI support

Other versions of this model

5 more in the same range

Questions about this item

What case clearance does the Micro ATX form factor of this board require?

The board uses the Micro ATX form factor, so it fits any chassis that supports Micro ATX or larger ATX layouts with standard standoff positions.

Which CPU power connectors must be populated for the 12+2+1 phase VRM to function?

Connect both the 8-pin and 4-pin EPS cables from the power supply; the 4-pin is often missed but is required for full phase operation.

When should the 20K black capacitors on the VRM be inspected or replaced?

The capacitors are rated for 20,000 hours at their maximum temperature; plan a visual check after several years of heavy use and replace if bulging or leaking appears.

More in Motherboards for AMD CPUs

Similar items