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ATX motherboard in silver and gunmetal with steel-reinforced PCIe slot and integrated I/O shield

ASRock Open box

ASRock X870 Steel Legend WiFi AMD motherboard AM5 DDR5 256GB

SKU CH-ZMY0-Z62GZ MPN X870 Steel Legend WiFi

AM5 motherboard with 14+2+1 80A power phases, DDR5 8000+ support to 256GB, PCIe 5.0 x16, dual USB4 Type-C, 2.5Gbps LAN and three M.2 slots

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD X870
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryDDR5 8000+(OC)
  • Supports Ryzen 9000, 8000 and 7000 series CPUs
  • 14+2+1 phase power with 80A Dr.MOS for stable delivery
  • Four DDR5 slots up to 256GB at DDR5 8000+(OC)
  • One PCIe 5.0 x16 and one PCIe 4.0 x16 slot
  • Blazing M.2 Gen5x4 128 Gb/s plus two Hyper M.2 Gen4x4

AM5 socket for Ryzen 7000 8000 9000

This ATX board pairs the AMD X870 chipset with an AM5 socket that accepts Ryzen 7000 8000 and 9000 series processors. Four DDR5 slots support dual channel memory up to 256GB at 8000+(OC) with AMD EXPO and Intel XMP 3.0 profiles. ECC unbuffered modules are supported.

14 phase 80A DrMOS plus USB4 and Nahimic

A 14+2+1 phase design uses 80A DrMOS for VCore and SOC delivery. Rear I/O includes two USB4 Type C ports and two USB 3.2 Gen2 Type A ports alongside 2.5Gbps LAN. Realtek ALC4082 codec drives 7.1 channel audio enhanced by Nahimic software.

PCIe 5.0 x16 slot speed depends on CPU generation

The primary PCIe 5.0 x16 slot runs at Gen5 x16 with 9000 and 7000 series CPUs, Gen4 x8 with 8000 Phoenix 1 and Gen4 x4 with 8000 Phoenix 2. The second PCIe 4.0 x16 slot is wired for x4 and is disabled when the third M.2 socket is populated.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $116.99
Cheaper than about 71% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASRock
Model nameX870 STEEL LEGEND WIFI
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD X870
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryDDR5 8000+(OC)
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesAMD EXPO / Intel XMP 3.0
ECC supportYes
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
Audio & video
Audio chipRealtek ALC4082
Sound channels7.1 Channels
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slots1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
PCIe 4.0 x16 slots1 x PCIe 4.0 x16 Slot (PCIE2), supports x4 mode*
Onboard USB headers2 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 Type C USB 3.2 Gen2 × 2 Header (20 Gb/s)
Power
Power connectors1 × 24 pin ATX Power Connector (Hi-Density Power Connector)
2 × 8 pin 12 V Power Connectors (Hi-Density Power Connector)
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight2.02 kg
Package size343 × 279 × 76 mm
Compatibility
Windows 11 supportWindows 10 64-bit / 11 64-bit
More details
BIOS256Mb AMI UEFI Legal BIOS with GUI support

Questions about this item

Will a Ryzen 9000 series processor run the top PCIe slot at full Gen5 x16 speed?

Yes, with a Ryzen 9000 or 7000 series CPU the primary slot operates at PCIe 5.0 x16; Ryzen 8000 Phoenix 1 drops to Gen4 x8 and Phoenix 2 to Gen4 x4.

Can I populate all three M.2 sockets and still use the second PCIe x16 slot?

No, installing a drive in the third M.2 socket (M2_3) disables the second PCIe x16 slot (PCIE2).

What DDR5 memory speed can I reach with EXPO modules on this board?

The board validates DDR5 up to 8000+ MT/s overclocked via AMD EXPO profiles across four slots.

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