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ASRock B850M Steel Legend WiFi (90-MXBS2-A0UAYZ)

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ASRock B850M Steel Legend WiFi
2025Steel LegendWi-FiM.2 coolingbacklightWhite Edition2.5 Gbps
Towards:gaming
Form Factor:micro-ATX
Socket:AM5
Chipset:AMD B850
BIOS:Ami
RAM slots:DDR5 4 sl
RAM form factor:DIMM
RAM clock:8000 MHz
Sound (channels):7.1
Connectors:HDMI, M.2
Additional connectors:DisplayPort
Power connector:24-pin
Processor power:8+4-pin
All specifications
Specifications B850M Steel Legend WiFi
Main
Featuresgaming
SocketAM5
Form factormicro-ATX
Power phases15 / 12+2+1 /
VRM heatsink
LED lighting
Lighting syncASRock Polychrome Sync
Size (HxW)244x244 mm
Chipset
ChipsetAMD B850
BIOSAmi
UEFI BIOS
RAM
DDR54 slot(s)
Memory moduleDIMM
Operation mode2 channel
Max. clock frequency8000 MHz
Max. memory256 GB
XMP
EXPO support
Drive interface
SATA 3 (6Gbps)4
M.2 connector3
M.22xPCIe 4x, 1xPCIe 2x
M.2 version1x5.0, 2x4.0
M.2 SSD cooling
Integrated RAID controller
Expansion slots
PCIe 4x slots1 pcs
PCIe 16x slots1 pcs
PCIe support5.0
Steel PCIe connectors
Internal connections
TPM connector
USB-A 2.02 pcs
USB-A 5Gbps2 pcs
USB-C 5Gbps1 pcs
ARGB LED strip3
RGB LED strip1
Video outputs
HDMI output
HDMI versionv2.1
DisplayPort
DisplayPort versionv.1.4
Integrated audio
AudiochipRealtek ALC1220
Sound (channels)7.1
Network interfaces
Wi-FiWi-Fi 7 (802.11be)
BluetoothBluetooth v5.4
LAN (RJ-45)2.5 Gbps
LAN ports1
LAN controllerDragon RTL8125BG
External connections
USB-A 2.04 pcs
USB-A 5Gbps2 pcs
USB-A 10Gbps1 pcs
USB-C 10Gbps1 pcs
BIOS FlashBack
Power connectors
Main power socket24-pin
CPU power8+4-pin
Fan power connectors5
CPU Fan 4-pin2
Chassis/Water Pump Fan 4-pin3
Official Websiteasrock.com
Added to E-CatalogJanuary 2025
P/N
90-MXBS2-A0UAYZ

E-Catalog UK editor, Motherboards
Valerii Lenko, edited 10.11.2025
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
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Asrock B850M Steel Legend WiFi AMD B850 Socket AM5 micro ATX

Asrock B850M Steel Legend WiFi AMD B850 Socket AM5 micro ATX PerformanceOptimized VRM Design20K CapacitorExclusive 20K Cap wi... moreth 1000uF CapacitanceThe upgraded 20K Black capacitor not only extends the lifespan to 20.000 hours but also increases the capacitance value from 560uF to 1000uF. bringing several benefits:- Higher Capacitance: Greater charge storage for better support under high loads.- Lower Ripple: Reduced power output fluctuations. improving quality.- More Stable Output Current: Stable power supply. minimizing voltage impacts.- Better Performance & System Stability: Increased reliability and consistent performance.VRM Design12+2+1 Power Phase DesignFeaturing 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. MOSDr.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.Power ConnectorHi-Density Power ConnectorCPU 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.2oz Copper PCB2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking.DDR5 XMP & EXPO SupportDerived 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. Make sure the memory modules are Intel® XMP/AMD EXPO™ capable and overclocking can be made so affordable. satisfying and absolutely no sweat at all.High Speed M.2 SolutionPCIe Gen5 Blazing M.2The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation. with a breathtaking 128Gb/s transfer speed. it is ready to unleash the full potential of future ultrafast SSDs.Hyper M.2 Gen4 x4Supports PCI Express 4.0 M.2 SSDs. it is capable of perform twice the speed compared to previous 3rd generation. giving a lightning fast data transferring experience.DIY Friendly DesignGraphics Card Lite ReleaseEquipped with an enlarged latch for easy pressing. simplifying both the installation and removal of graphics cards.M.2 Bottom HeatsinkThe M.2 bottom heatsink is able to dissipate heat of the M.2 SSD efficiently through the motherboard PCB. maximize performance while maintaining system stability.CoolingIntelligent Cooling DesignAluminum HeatsinkThe first thing that catches the eye is the
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Motherboard ASRock B850M Steel Legend WiFi