ASRock B850 Steel Legend WiFi AMD AM5 Socket Motherboard, ATX, 4x DDR5 Slots, 4x M.2 Sockets, Fitted I/O Shield, 2.5GbE LAN, Wi-Fi 7, 1x HDMI Port

ASRock B850 Steel Legend WiFi Motherboard (ATX, AM5, DDR5, Wi-Fi 7)

The ASRock B850 Steel Legend WiFi is an ATX motherboard designed for AMD Socket AM5 Ryzen 9000, 8000, and 7000 Series processors. It combines robust power delivery, advanced DDR5 support, PCIe Gen5, Wi-Fi 7, and extensive storage and connectivity options in a durable 8-layer PCB design.

Key Features

• Supports AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors
• 14+2+1 Phase Power Design, 80A Dr.MOS for VCore+SOC+MISC
• 4 x DDR5 DIMM Slots
• Dual Channel DDR5
• Up to 8000+ (OC)
• Supports ECC/non-ECC, un-buffered memory
• Max capacity up to 256GB
• Supports XMP and EXPO memory profiles
• PCIe Expansion
• 1 x PCIe 5.0 x16 (CPU)
• 1 x PCIe 4.0 x16 (Chipset, x4 mode)
• Graphics Output
• 1 x HDMI 2.1 TMDS/FRL 8G compatible, up to 4K 120Hz, HDR, HDCP 2.3
• Audio
• Realtek ALC4082 7.1 CH HD Audio Codec
• Content Protection
• Individual PCB layers for R/L channels
• Direct Drive front headphone port (up to 600 Ohm headsets)
• Nahimic Audio
• Storage
• 1 x Blazing M.2 (PCIe Gen5x4)
• 3 x Hyper M.2 (PCIe Gen4x4)
• 4 x SATA3 6.0 Gb/s
• Supports NVMe SSD as boot disks
• Networking
• Realtek 2.5G LAN (Dragon RTL8125BG)
• 802.11be Wi-Fi 7 (2x2)
• Bluetooth 5.4
• USB Connectivity
• 1 x USB 3.2 Gen2x2 Type-C (Front)
• 4 x USB 3.2 Gen2 (2 Rear, 2 Rear Type-C)
• 7 x USB 3.2 Gen1 (3 Rear, 4 Front)
• 8 x USB 2.0 (4 Rear, 4 Front)
• Cooling & Design Enhancements
• Enlarged heatsink armor
• Toolless Multi-Layer M.2 heatsink
• M.2 bottom heatsink
• Lite Release Design for easy GPU installation
• Durability
• 8 Layer PCB
• 20K long-lasting black caps (high quality, conductive polymer capacitors)
• Exclusive 1000uF capacitor with 20,000 hrs lifespan

Power Design & Durability

• 14+2+1 Power Phase Design
  VCore with Dr.MOS design delivers smoother, neater power to the CPU.

• Exclusive 20K Capacitor (1000uF)
  ASRock’s exclusive 1000uF capacitor with a 20,000-hour lifespan helps ensure stable, consistent performance.

• Rock-Solid Durability

• Enlarged heatsink armor
• Hi-Density power connectors (24-pin ATX, 2 x 8-pin 12V)
• 20K long-lasting black caps

Cooling & Installation Features

• Lite Release Design
  Enlarged latch for easier pressing, simplifying graphics card installation and removal.

• Toolless Multi-Layer M.2 Heatsink
  Quick-release mechanism for effortless, toolless M.2 SSD installation.

• M.2 Bottom Heatsink
  Helps dissipate heat through the motherboard PCB to maintain performance and stability.

• Smart Fan Controls

• 2 x CPU Fan connectors (4-pin)
• 3 x Chassis Fan connectors (4-pin)
• 1 x AIO Pump Fan connector (4-pin)
• Smart Fan Speed Control on all fan headers
• CPU_FAN1 supports up to 1A (12W)
• CPU_FAN2, CHA_FAN1–3, AIO_PUMP support up to 3A (36W)
• Auto-detect 3-pin or 4-pin fans (CPU_FAN2, CHA_FAN1–3, AIO_PUMP)

High-Speed Connectivity

• Ultrafast Networking
• Realtek Dragon 2.5G LAN (10/100/1000/2500 Mb/s)

• Dragon 2.5G LAN software with:

  • Smart Auto Adjust Bandwidth Control
  • Visual UI & network usage statistics
  • Optimized presets for game, browser, and streaming
  • User-customized priority control

• Wi-Fi 7 (802.11be)

• 2x2 Wi-Fi 7 module
• Supports IEEE 802.11a/b/g/n/ac/ax/axe/be
• 2.4GHz / 5GHz / 6GHz bands
• 160MHz channel bandwidth with 6GHz band
• 1 antenna supporting 2T2R diversity
• Supports MU-MIMO

• Wi-Fi 7 (6GHz) support via Windows 11 and regional regulations (enabled via Windows and software updates where available)

• Bluetooth 5.4

USB & I/O

USB Configuration

• CPU
• 2 x USB 3.2 Gen2 Type-C (Rear)
• 1 x USB 3.2 Gen2 Type-A (Rear, USB32_3)

• 1 x USB 3.2 Gen1 Type-A (Rear, USB32_1)

• Chipset

• 1 x USB 3.2 Gen2x2 Type-C (Front)
• 1 x USB 3.2 Gen2 Type-A (Rear, USB32_4)
• 6 x USB 3.2 Gen1 Type-A (2 Rear: USB32_2, USB32_5; 4 Front)
• 8 x USB 2.0 (4 Rear, 4 Front)

All USB ports support ESD protection.
USB32_1–2 are Lightning Gaming Ports.
USB32_3–4 support Ultra USB Power.

Rear Panel I/O

• 2 x Antenna ports
• 1 x HDMI port
• 1 x Optical SPDIF Out
• 2 x USB 3.2 Gen2 Type-C (10 Gb/s)
• 3 x USB 3.2 Gen1 Type-A
• 2 x USB 3.2 Gen2 Type-A (10 Gb/s)
• 4 x USB 2.0
• 1 x RJ-45 LAN port
• 1 x BIOS Flashback button
• 1 x Line Out jack (gold audio jack)
• 1 x Microphone input jack (gold audio jack)

Storage & RAID

• CPU-Connected M.2
• 1 x Blazing M.2 (M2_1, Key M)
  • Type 2280
  • PCIe Gen5x4 (128 Gb/s)
  • Gen5x4 with Ryzen 9000 & 7000 series
  • Gen4x4 with Ryzen 8000 (Phoenix 1 & Phoenix 2)

• 1 x Hyper M.2 (M2_2, Key M)

  • Type 2260/2280
  • PCIe Gen4x4 (64 Gb/s)
  • Gen4x4 with Ryzen 9000 & 7000 series
  • Gen4x4 with Ryzen 8000 (Phoenix 1)
  • Gen4x2 with Ryzen 8000 (Phoenix 2)

• Chipset-Connected M.2

• 1 x Hyper M.2 (M2_3, Key M)
  • Type 2230/2260/2280
  • PCIe Gen4x4 (64 Gb/s)

• 1 x Hyper M.2 (M2_4, Key M)

  • Type 2260/2280
  • PCIe Gen4x4 (64 Gb/s)

• SATA

• ASMedia ASM1061 controller

• 4 x SATA3 6.0 Gb/s connectors

• Priority & Lane Sharing

• M2_1 is the first priority for M.2 installation.

• If M2_4 is occupied, PCIE2 (PCIe 4.0 x16 slot) will be disabled.

• RAID Support

• RAID 0, RAID 1, RAID 10 for M.2 NVMe storage devices

Expansion Slots & Graphics

• Expansion Slots
• CPU:
  • 1 x PCIe 5.0 x16 (PCIE1), supports x16 mode
  • PCIE1 runs at:
  • Gen5x16 with Ryzen 9000 & 7000 series
  • Gen4x8 with Ryzen 8000 (Phoenix 1)
  • Gen4x4 with Ryzen 8000 (Phoenix 2)
• Chipset:
  • 1 x PCIe 4.0 x16 (PCIE2), supports x4 mode

• 1 x Vertical M.2 Socket (Key E)

  • Supports type 2230 PCIe WiFi/BT module

• Additional Slot Features

• 15µ gold contact in VGA PCIe Slot (PCIE1)

• Supports NVMe SSD as boot disks

• Integrated Graphics

• Integrated AMD RDNA graphics (actual support may vary by CPU)
• HDMI 2.1 TMDS/FRL 8G compatible
• Supports HDR, HDCP 2.3
• Max resolution: up to 4K 120Hz

Headers & Internal Connectors

• 1 x SPI TPM header
• 1 x Thermistor cable header
• 1 x Power LED and speaker header
• 1 x RGB LED header
• 3 x Addressable LED headers
• 2 x CPU fan connectors (4-pin)
• 3 x Chassis fan connectors (4-pin)
• 1 x AIO pump fan connector (4-pin)
• 1 x 24-pin ATX power connector (Hi-Density)
• 2 x 8-pin 12V power connectors (Hi-Density)
• 1 x Front panel audio connector
• 2 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 USB 3.2 Gen2x2 Type-C header (20 Gb/s)

LED Power Support:
- Up to 12V/3A, 36W LED strip total
- Up to 5V/3A, 15W LED strip total

BIOS & Software

• BIOS
• 256Mb AMI UEFI Legal BIOS with GUI support
• ASRock EZ Mode
• ASRock Full HD UEFI

• BIOS Flashback button

• Software & Utilities

• ASRock Motherboard Utility (A-Tuning)
• ASRock Dragon 2.5G LAN Software
• ASRock Polychrome SYNC
• ASRock Auto Driver Installer
• ASRock Instant Flash
• ASRock EZ Troubleshooter
• ASRock Post Status Checker

Platform & Form Factor

• Form Factor: ATX (12.0" x 9.6" / 30.5 cm x 24.4 cm)
• PCB: 8 Layer PCB

Unique Features:

• Superb Productivity
• PCIe Gen5 (Graphics, M.2)
• Dual Channel DDR5
• Rock-Solid Durability
• 14+2+1 Power Phase with 80A Dr.MOS for VCore+SOC+MISC
• Enlarged heatsink armor
• Flexible integrated I/O shield
• 20K long-lasting black caps

Operating System & Certifications

• OS Support
• Microsoft Windows 10 64-bit

• Microsoft Windows 11 64-bit

• Certifications

• FCC
• CE
• ErP/EuP ready (ErP/EuP ready power supply required)

Included Accessories

• 2 x SATA data cables
• 2 x ASRock WiFi 2.4/5/6 GHz antennas
• 1 x Thermistor cable

Specifications Summary Table