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ASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen 9000/8000/7000, DDR5 8000+ OC, PCIe 5.0 x16, WiFi 7, 3X M.2 (1x Gen5), USB 3.2 Gen2 Type-C, BIOS Flashback
ASRock

ASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen 9000/8000/7000

Bottom line: The ASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen: PCIe 5.0 x16 + Gen5 M.2 for next-gen GPUs and SSDs; main trade-off: micro-ATX layout limits slots vs full ATX boards.

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Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ PCIe 5.0 x16 + Gen5 M.2 for next-gen GPUs and SSDs
  • ✓ AM5 socket runs Ryzen 9000/8000/7000 CPUs
  • ✓ 12+2+1 Dr.MOS VRM with extended heatsink armor
  • ✓ WiFi 7 (802.11be) plus 2.5G LAN onboard
  • ✓ 4 DDR5 slots, up to 256GB, DDR5-8000+ OC / EXPO

Cons

  • ✗ Micro-ATX layout limits slots vs full ATX boards
  • ✗ Only 1 of 3 M.2 sockets is PCIe Gen5
  • ✗ B850 chipset trails X870 on lane count/USB4
  • ✗ IGP output needs a Ryzen CPU with integrated graphics

Manufacturer description

ASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen 9000/8000/7000, DDR5 8000+ OC, PCIe 5.0 x16, WiFi 7, 3X M.2 (1x Gen5), USB 3.2 Gen2 Type-C, BIOS Flashback

SpecPicks Verdict

SpecPicks scored ASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen… using a rating × review-volume × price-fit model applied to published specs and reviews across the retro motherboards category. ASRock's retro motherboards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Unique FeaturesOutstanding Productivity- PCIe Gen5 (Graphics, M.2)- Dual Channel DDR5 Rock-Solid Durability- Power Phase 12+2+1, Dr.MOS for VCore+SOC+MISC with Extended Heatsink Armor- Flexible Integrated I/O Shield- Black Capacitors Long Lasting 2017 K (High Quality Conductive Polymer Capacitors)Fast Ultraf Connectivity- 2.5G LAN, Wi-Fi 7 Module 802.11beEZ Upgrade- BIOS Backup Button- ASRock Automatic Driver Installer EZ Troubleshooter
  • CPU- Supports AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series processors** Expansion slot availability may vary by CPU. Please refer to the PCIe/M.2 Bandwidth Table for details.Chipset- AMD B850Memory- DDR5 Dual Channel Memory Technology- 4 x DDR5 DIMM Slots- Supports DDR5 ECC/non-ECC memory, unbuffered, up to 8000+(OC)- Maximum system memory capacity: 256GB- Supports Extreme Memory Profile (XMP) and Per. EXTENDED files for Overclocking (EXPO) memory modules BIOS- 256Mb AMI UEFI legal BIOS with GUI support
  • GraphicsAMD RDNA Integrated Graphics (Actual support may vary by CPU)- 1 x HDMI 2.1 TMDS/FRL 8G compatible, supports HDR, HDCP 2.3 and maximum resolution up to 4K 120Hz- 1 x DisplayPort 1.4 with DSC (compressed), supports HDCP 2.3 and maximum resolution up to 4K 120Hz Audio- HD Audio 7.1 CH with Content Protection (Realtek Audio Code ALC1220)- Impedance Detection at Rear Output Port- Individual PCB Layers for Audio Channel R/L- Audio NahimicLAN- 2.5 Gigabit LAN 10/100/1000/2500 Mb/s

Full Specifications

BrandASRock
Weight2.5g
PlatformWindows 11
CPU ModelRyzen 7
CPU SocketSocket AM5
Model NameB850M STEEL LEGEND WIFI
Chipset TypeAMD B850
ConnectivityUSB, WiFi
Model NumberB850M STEEL LEGEND WIFI
Mfr Part NumberB850M Steel Legend WiFi
Number of Items1
Number of Ports17
Total Usb Ports17
Processor SocketSocket AM5
Total PCIe Ports5
Total SATA Ports4
Compatible DevicesPC, Monitor, Keyboard, Mouse
Memory Clock Speed8000 MHz
Warranty Description3 Years Manufacturer
Compatible ProcessorsAMD Ryzen 9000/8000/7000 Series
Full listing titleASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen 9000/8000/7000, DDR5 8000+ OC, PCIe 5.0 x16, WiFi 7, 3X M.2 (1x Gen5), USB 3.2 Gen2 Type-C, BIOS Flashback

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ASRock B850M Steel Legend WiFi Micro-ATX AM5 Motherboard: Ryzen 9000/8000/7000, DDR5 8000+ OC, PCIe 5.0 x16, WiFi 7, 3X M.2 (1x Gen5), USB 3.2 Gen2 Type-C, BIOS Flashback is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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