ASROCK ATX motherboard B850 STEEL LEGEND-WIFI AM5 DSP0000042379

Features of the ASRock B850 Steel Legend WiFi
The ASRock B850 Steel Legend WiFi is an ATX motherboard with an AMD B850 chipset, designed for AMD Ryzen™ 9000, 8000 and 7000 series processors with an AM5 socket. It combines a robust 14+2+1-phase power design, DDR5 memory, PCIe 5.0, Wi-Fi 7 and 2.5 GbE LAN, providing a platform ready for gaming PCs, high-performance configurations and everyday use.
AMD AM5 platform with chipset B850
This motherboard features an AMD AM5 socket and AMD B850 chipset, providing compatibility with different generations of Ryzen™ processors. The availability and speed of certain PCIe and M.2 slots may vary depending on the installed processor.

Socket AMD AM5
Compatible with AMD Ryzen™ 9000, 8000 series and 7000
Chipset AMD B850
ATX form factor, 30.5 x 24.4 cm
8-layer PCB

Robust power delivery and durable components
Its 14+2+1-phase power design with 80 A Dr.MOS for VCore, SOC and MISC is complemented by extended heatsink coverage. The construction includes long-life Black Caps capacitors and high-density power connectors to provide a stable foundation for the system.

14+2+1-phase power design
80 A Dr.MOS for VCore + SoC + MISC
Long-life Black Caps conductive polymer capacitors 20K
1 high-density 24-pin ATX connector
2 high-density 8-pin 12 V power connectors
Flexible integrated I/O shield

DDR5 memory up to 256 GB
Its four DDR5 slots in Dual Channel configuration support up to 256 GB of memory. It supports unbuffered ECC and non-ECC modules and speeds of up to 8000+ via overclocking, as well as XMP and AMD EXPO profiles for easy configuration of compatible memory.

4 slots DDR5 DIMM
Dual Channel architecture
Maximum capacity of 256 GB
Unbuffered DDR5 ECC and non-ECC
Speeds of up to DDR5 8000+ (OC)
Compatible with XMP and AMD EXPO profiles

PCIe 5.0 for graphics cards
The primary slot provides PCIe 5.0 x16 connectivity with Ryzen™ 9000 and 7000 series processors, allowing you to take advantage of high-performance expansion cards. The motherboard also features a second PCIe 4.0 x16 slot operating in x4 mode.

1 PCIe 5.0 x16 PCIE1 with 15 µ gold contact
PCIE1 operates as Gen5 x16 with Ryzen™ 9000 and 7000
PCIE1 operates as Gen4 x8 with Ryzen™ 8000 Phoeni x 1
PCIE1 operates as Gen4 x4 with Ryzen™ 8000 Phoeni x 2
1 PCIe 4.0 x16 PCIE2 operating in mode x4
PCIE2 is disabled when M2_4 is occupied
1 vertical Key E type 2230 M.2 socket for WiFi/BT PCIe modules

Four M.2 slots and PCIe storage 5.0
The ASRock B850 Steel Legend WiFi offers four NVMe M.2 connections, including one Blazing M.2 PCIe Gen5 x4 with speeds of up to 128 Gb/s. These are complemented by four 6 Gb/s SATA3 connectors and RAID support for storage configurations tailored to different needs.

1 Blazing M.2 M2_1 type 2280 PCIe Gen5 x4, up to 128 Gb/s
1 Hyper M.2 M2_2 type 2260/2280 PCIe Gen4 x4, up to 64 Gb/s
1 Hyper M.2 M2_3 type 2230/2260/2280 PCIe Gen4 x4, up to 64 Gb/s
1 Hyper M.2 M2_4 type 2260/2280 PCIe Gen4 x4, up to 64 Gb/s
4 SATA3 6 Gb/s connectors via ASMedia ASM1061
Compatible with NVMe SSDs as boot drives
RAID 0, RAID 1 and RAID 10 for M.2 NVMe devices

The performance of the M.2 slots depends on the installed processor. M2_1 operates as Gen5 x4 with Ryzen™ 9000 and 7000 and as Gen4 x4 with Ryzen™ 8000 Phoenix 1 and Phoenix 2. M2_2 operates as Gen4 x4 with the 9000 and 7000 series, Gen4 x4 with Ryzen™ 8000 Phoenix 1 and Gen4 x2 with Ryzen™ 8000 Phoenix 2. M2_1 is the preferred slot for installing an M.2 drive, and using M2_4 disables PCIE2.
Wi-Fi 7, Bluetooth 5.4 and 2.5 Gigabit LAN
Network connectivity combines Wi-Fi 7 802.11be 2x2, Bluetooth 5.4 and 2.5 Gigabit Ethernet. This configuration lets you choose between wired and wireless connections and is complemented by Dragon tools for managing priorities and bandwidth.

Wi-Fi 7 802.11be 2x2
Compatible with IEEE 802.11a/b/g/n/ac/ax/axe/be
2.4 GHz, 5 GHz and 6 GHz bands
160 MHz channel bandwidth in the 6 GHz band
2T2R technology and MU-MIMO
Bluetooth 5.4
2.5 Gigabit LAN 10/100/1000/2500 Mb/s
Dragon controller RTL8125BG
Dragon 2.5G LAN software with bandwidth control, usage statistics and customizable priorities
Optimised profiles for gaming, browsing and streaming

The Wi-Fi 7 module requires Microsoft® Windows® 11 and has no driver for Windows® 10. 6 GHz band availability depends on the regulations in each country or region and the corresponding enablement through updates.
7.1 HD Audio with Realtek ALC4082
The audio section uses the Realtek ALC4082 codec with 7.1-channel HD audio. The right and left audio channels use separate PCB layers, and the front output features Direct Drive technology, compatible with headphones up to 600 ohms.

7.1-channel HD audio
Realtek codec ALC4082
Content protection
Separate PCB layers for the right and left audio channels
Direct Drive on the front connection for headphones up to 600 ohms
Nahimic Audio
SPDIF optical output

HDMI 2.1 output up to 4K at 120 Hz
When using a processor with compatible integrated AMD RDNA™ graphics, the motherboard lets you use its HDMI 2.1 output at resolutions up to 4K at 120 Hz. Specific graphics compatibility depends on the installed CPU.

Integrated AMD RDNA™ graphics, depending on CPU
1 EXIT HDMI 2.1 TMDS/FRL 8G
Maximum resolution of up to 4K at 120 Hz
Compatible with HDR and HDCP 2.3

Extensive USB connectivity
The motherboard offers a comprehensive selection of connections, including front USB 3.2 Gen2x2 Type-C up to 20 Gb/s, multiple USB 3.2 Gen2 ports, and USB 3.2 Gen1 and USB 2.0 connections. All USB ports feature ESD protection.

1 front 20 Gb/s USB 3.2 Gen2x2 Type-C
2 rear USB 3.2 Gen2 Type-C
2 rear USB 3.2 Gen2 Type-A
6 USB 3.2 Gen1 Type-A, 2 rear and 4 front
8 USB 2.0, 4 rear and 4 front
ASRock Lightning Gaming Ports
USB32_34 supports Ultra USB Power
ESD protection on all USB ports

Internal cooling and lighting connections
To simplify system setup, it features dedicated connectors for fans, an AIO pump and addressable RGB lighting. The main connectors support intelligent speed control, and certain headers automatically detect 3- or 4-pin fans.

2 4-pin CPU Fan connectors with Smart Fan Speed Control
3 4-pin Chassis Fan connectors with Smart Fan Speed Control
1 4-pin AIO Pump connector with Smart Fan Speed Control
CPU_FAN1 supports up to 1 A and 12 W
CPU_FAN2, CHA_FAN1~3 and AIO_PUMP support up to 3 A and 36 W
Automatic detection of 3- or 4-pin fans on CPU_FAN2, CHA_FAN1~3 and AIO_PUMP
1 RGB LED header up to 12 V/3 A and 36 W
3 Addressable LED headers, up to 5 V/3 A and 15 W in total
1 thermistor cable header

Rear connectivity and BIOS Flashback
The rear panel brings together the main connections and features a BIOS Flashback button for easy firmware management. It also includes dedicated connections for wireless antennas, 2.5 GbE networking, audio, HDMI and USB.

2 antenna connections
1 HDMI
1 SPDIF optical output
2 USB 3.2 Gen2 Type-C at 10 Gb/s
3 USB 3.2 Gen1 Type-A
2 USB 3.2 Gen2 Type-A at 10 Gb/s
4 USB 2.0
1 RJ-45 LAN
1 BIOS Flashback button
1 line-out with gold-plated audio jack
1 microphone input with gold-plated audio jack

Configuration and diagnostic tools
The motherboard includes features designed to simplify updates, configuration and troubleshooting. These include BIOS Flashback, ASRock Post Status Checker and the automatic driver installer.

256 Mb AMI UEFI BIOS with graphical interface
ASRock EZ Mode
ASRock Full HD UEFI
ASRock Instant Flash
ASRock Auto Driver Installer
ASRock Post Status Checker
ASRock Motherboard Utility A-Tuning
ASRock Polychrome Sync
ASRock Dragon 2.5G LAN Software

Other specifications and accessories
The ASRock B850 Steel Legend WiFi completes its feature set with additional internal connections, storage accessories and wireless connectivity, as well as FCC and CE certifications.

1 SPI TPM header
1 Power LED and Speaker header
1 front panel audio connector
2 USB 2.0 headers for up to 4 ports
2 USB 3.2 Gen1 headers for up to 4 ports
1 front USB Type-C 3.2 Gen2x2 header at 20 Gb/s
2 SATA data cables
2 ASRock WiFi antennas for 2.4/5/6 GHz
1 thermistor cable
Compatible with Microsoft® Windows® 10 64-bit and Windows® 11 64-bit
FCC and CE certifications
ErP/EuP compliant when used with a compatible power supply
Volume (m ³): 0.0091