ASRock B850 Steel Legend WiFi ATXマザーボード MB6707

This article covers ASRock B850 Steel Legend WiFi ATXマザーボード MB6707.

Overview

The ASRock B850 Steel Legend WiFi is an ATX motherboard built around the AMD B850 chipset, designed for Socket AM5 processors. It supports Ryzen 9000, 8000, and 7000 series CPUs, making it a versatile choice for both current and next-generation AMD builds. With DDR5 memory support and a PCIe 5.0-ready M.2 slot, this board is well-equipped for modern high-speed storage and memory. Positioned as a mid-range offering in ASRock's Steel Legend lineup, the B850 Steel Legend WiFi strikes a balance between features and price. It inherits the series' distinctive white-and-gray military-inspired aesthetic, which stands out in a market dominated by black PCBs. The board includes Wi-Fi 7, 2.5GbE LAN, and Bluetooth 5.4 out of the box, eliminating the need for add-on cards. For builders who want a solid AM5 foundation without paying a premium for an X870 or X670E chipset, this motherboard delivers where it counts: a robust 14+2+1 phase VRM, four DDR5 slots, and four M.2 connectors. It also includes practical features like BIOS Flashback and a Post Status Checker for easy troubleshooting.

Compatibility Guide

The B850 Steel Legend WiFi uses Socket AM5, compatible with AMD Ryzen 9000 (Granite Ridge), 8000 (Phoenix), and 7000 (Raphael) series processors. This covers everything from a budget Ryzen 5 7500F to a flagship Ryzen 9 9950X. Memory support is limited to DDR5 only, with four DIMM slots supporting up to 256GB. Both AMD EXPO and Intel XMP 3.0 profiles are supported, with official speeds ranging from DDR5-4800 up to DDR5-8000+ when overclocking. Expansion includes one PCIe 5.0 x16 slot and one PCIe 4.0 x16 slot (x4 electrical). Storage connectivity is generous: one PCIe 5.0 x4 M.2 slot, three PCIe 4.0 x4 M.2 slots, and four SATA3 ports. This configuration allows for a fast boot drive plus ample secondary storage without lane sharing issues in typical single-GPU setups. Power delivery uses a 24-pin main connector plus an 8+4-pin CPU power setup. A 650W-750W PSU is sufficient for mid-range builds, while 850W or higher is recommended when pairing a Ryzen 9 with a high-end graphics card.

Product Info

The ASRock B850 Steel Legend WiFi launched in early 2025 as a mid-range ATX motherboard. Its market positioning sits at the upper end of mid-range, offering features typically found on more expensive boards: a 14+2+1 phase 80A Dr.MOS VRM, Wi-Fi 7, and a PCIe 5.0 M.2 slot. Key specifications include an ATX form factor (305×244mm), AMD B850 chipset, four DDR5 DIMM slots (max 256GB), one PCIe 5.0 x16 slot, one PCIe 4.0 x16 slot, four M.2 slots (one PCIe 5.0), four SATA3 ports, Wi-Fi 7, Bluetooth 5.4, and 2.5GbE LAN. The board carries a standard three-year manufacturer warranty.

Best Use Cases

Mid-Range Gaming Builds Pair this board with a Ryzen 5 7600 or Ryzen 7 7800X3D and a mid-to-high-end GPU like the RTX 4070 or RX 7800 XT. The B850 chipset supports overclocking, so enthusiasts can tweak memory and CPU settings. This combination delivers excellent 1440p gaming performance without overspending on a flagship chipset. White-Themed PC Builds The Steel Legend's white-and-gray PCB is a rare find at this price point. It pairs beautifully with white cases, white GPU shrouds, and silver or white CPU coolers. For builders who prioritize aesthetics, this board offers a clean look that black boards simply cannot match. High-Speed Storage Users With one PCIe 5.0 M.2 slot, this motherboard can fully utilize the fastest NVMe SSDs currently available. Video editors, data analysts, and gamers who frequently load large files will benefit from the reduced transfer times. The three additional PCIe 4.0 M.2 slots provide plenty of room for expansion. Budget-Conscious Future-Proofing Choosing B850 over X870 saves money while retaining core AM5 platform features. You get PCIe 5.0 for graphics and storage, DDR5 support, and a solid VRM that can handle future Ryzen 9000-series upgrades. This makes it a smart choice for builders who want a capable system now with an easy upgrade path later.

Things to Consider

The B850 chipset has fewer PCIe lanes than X870 or X670E. Specifically, there are no chipset-provided PCIe 5.0 lanes; only the CPU-connected M.2 slot runs at Gen5 speeds. If you need multiple Gen5 SSDs or plan to run a dual-GPU setup, stepping up to an X870E or X670E board is advisable. Audio quality is another area where cost-cutting is evident. The Realtek ALC897 codec is functional but not audiophile-grade. Users with high-impedance headphones or those who demand pristine audio output should consider a USB DAC or sound card. The second PCIe x16 slot runs at PCIe 4.0 x4 electrically, not x16. This limits its usefulness for a second graphics card, though it is fine for storage controllers or capture cards. ## FAQ
Q: Can I use a Ryzen 5 8400F (Ryzen 8000 series) with this board? A: Yes, the B850 Steel Legend WiFi supports Ryzen 8000 series (Phoenix core) proc

Product Disclosure (Amazon)

• Manufacturer: ASRock
• Seller: インボイス登録事業者☆24時間以内発送Vstore☆
• Fulfilled by: Amazon
• ASIN: B0DRTTJ5D6
• Note: This article covers a manufacturer-made product based on Amazon listing details.