ASRock B850M Steel Legend WiFi AM5 Micro-ATX Motherboard
ASRock
ASRock B850M Steel Legend WiFi AM5 Micro-ATX Motherboard
The ASRock B850M Steel Legend WiFi is a Micro-ATX motherboard built for daily users and mainstream enthusiasts who want a stable, feature-rich AMD AM5 platform without compromising on power delivery or connectivity. It addresses the need for a capable mid-range board that supports the latest Ryzen processors, fast DDR5 memory, PCIe 5.0 storage, and integrated WiFi 7, all in a compact form factor.
Why this product
AMD AM5 with Ryzen 9000/8000/7000 support
It is compatible with AMD Socket AM5 processors across three generations, giving builders flexibility now and room to upgrade later.
12+2+1 phase Dr.MOS power design
The integrated Dr.MOS power stages deliver higher current per phase compared to discrete MOSFETs, improving thermal performance and supporting stable CPU overclocking.
PCIe Gen5 M.2 and fast storage array
One Blazing M.2 slot runs at PCIe Gen5 x4 for the fastest available NVMe drives, alongside two additional M.2 slots and four SATA3 ports for flexible storage configurations.
WiFi 7 and 2.5G LAN built in
802.11be WiFi 7 and Realtek 2.5 Gigabit LAN are included on-board, covering both wired and wireless high-speed networking without add-in cards.
DDR5 up to 8000+ MHz with XMP and EXPO
Four DDR5 DIMM slots support dual-channel operation up to 8000+ MHz (OC) and accept pre-tested XMP and EXPO profiles for straightforward memory overclocking.
BIOS Flashback for hassle-free updates
BIOS Flashback lets builders update the firmware without a CPU or memory installed, useful when preparing a board for a newly released processor.
- SocketAMD AM5
- ChipsetAMD B850
- Form FactorMicro ATX
- Memory4 x DDR5 DIMM, up to 256 GB, DDR5 8000+ (OC)
- Primary M.2PCIe Gen5 x4 (Blazing M.2)
- Wireless802.11be WiFi 7 + Bluetooth
- LANRealtek 2.5 Gigabit
- USB Rear2× USB 3.2 Gen2 Type-A+C, 2× USB 3.2 Gen1, 4× USB 2.0
- SKUASR-1872
- EAN4711581490499
- Fits AMD Socket AM5 — compatible with Ryzen 9000, 8000 and 7000 series processors.
- Fits Micro-ATX (mATX) cases and full-ATX cases that accept smaller boards.
- Works with DDR5 ECC and non-ECC unbuffered memory modules up to a maximum of 256 GB across four slots.
- Mini-ITX cases will not accommodate this board; verify case clearance before purchase.
- Not compatible with AMD AM4 or Intel LGA processors — AM5 socket only.
- Does not accept DDR4 memory — DDR5 only.
Best for
- Mainstream enthusiasts and gamers who want PCIe 5.0 storage, DDR5 overclocking and Dr.MOS power delivery in a compact Micro-ATX footprint.
- Builders who need integrated wireless — WiFi 7 and Bluetooth are included on-board, avoiding the cost and slot use of a separate wireless card.
- Storage-heavy workloads — three M.2 slots (including one PCIe Gen5) plus four SATA3 ports allow a wide mix of drives simultaneously.
- Users upgrading to AM5 across Ryzen generations, as multi-generation CPU support and BIOS Flashback make it easier to transition or upgrade later.
- Enthusiasts who want RGB lighting control, with Polychrome RGB Sync allowing synchronisation across compatible accessories.
Trade-offs
- Mini-ITX or small-form-factor builds — the Micro-ATX form factor will not fit cases designed exclusively for Mini-ITX boards.
- AMD AM4 or Intel platform users — this board uses the AM5 socket exclusively and is not compatible with previous-generation processors.
- High-end HEDT or workstation use — the B850 chipset targets mainstream builds and does not offer the lane counts or ECC registered memory support of workstation platforms.
- Users needing more than two PCIe expansion slots — only one PCIe 5.0 x16 and one PCIe 4.0 x4 slot are available.
Steel Legend represents the philosophical state of rock-solid durability and irresistible aesthetics. Built around most demanding specs and features, the Steel Legend series aims at daily users and mainstream enthusiasts! Providing a strong array of materials/components to ensure a stable and reliable performance.
2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking. Derived from the "built for stable and reliable" designing concept, ASRock does not compromise on any details.
This motherboard is built with high quality materials, enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles.
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs, it intelligently delivers higher current for each phase, thus providing improved thermal result and superior performance.
CPU overclocking requires higher current. ASRock Hi-Density Power Connectors are designed to withstand higher currents compared to traditional CPU and ATX power connectors, providing a more stable system and reducing the risk of fire during heavy overclocking.
Unlike most so called pre-mounted I/O shield that is only decorated with fancy color schemes. We reserve more tolerance space and allow IO shield is adjustable when installing, thus fitting chassis perfectly without any mechanical issue.
Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.
General
| Brand | ASRock |
|---|---|
| Model | B850M Steel Legend WiFi |
| Form Factor | Micro ATX |
| Socket | AMD AM5 |
| Chipset | AMD B850 |
| CPU Support | AMD Ryzen 9000, 8000 and 7000 Series |
| BIOS | 256Mb AMI UEFI with GUI, BIOS Flashback |
Memory & Storage
| Memory Slots | 4 x DDR5 DIMM (Dual Channel) |
|---|---|
| Memory Speed | Up to DDR5 8000+ (OC) |
| Max Memory | 256 GB |
| Memory Type | DDR5 ECC / non-ECC unbuffered |
| Memory Profiles | XMP and EXPO |
| Blazing M.2 | PCIe Gen5 x4 |
| Hyper M.2 | PCIe Gen4 x4 |
| M.2 | PCIe Gen4 x2 |
| SATA3 Ports | 4 |
| Expansion Slots | 1 x PCIe 5.0 x16, 1 x PCIe 4.0 x4 |
Networking & Wireless
| LAN | Realtek 2.5 Gigabit (Dragon RTL8125BG) — 10/100/1000/2500 Mb/s |
|---|---|
| WiFi Standard | 802.11be (WiFi 7) |
| Bluetooth | Included |
| Antennas Included | 2 x ASRock WiFi 2.4/5/6 GHz Antennas |
Ports & Connectivity
| Rear USB | 2x USB 3.2 Gen2 Type-A+C, 2x USB 3.2 Gen1, 4x USB 2.0 |
|---|---|
| Front USB Headers | 1x USB 3.2 Gen1 Type-C, 4x USB 3.2 Gen1, 4x USB 2.0 |
| Graphics Output | 1 x HDMI, 1 x DisplayPort |
| Audio | 7.1 CH HD Audio, Realtek ALC1220, Nahimic Audio |
| Power Design | 12+2+1 Phase, Dr.MOS (VCore+SOC+MISC) |
| Accessories | 2x SATA cables, 2x WiFi antennas, 1x Thermistor cable, M.2 screws and standoff |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.