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Black ATX motherboard with silver heatsinks and AM4 socket

ASUS

ASUS ROG Crosshair VIII Hero AM4 DDR4 128GB ATX AMD motherboard

SKU CH-WMJB-MK9RD

ATX AMD X570 board with AM4 socket supporting up to 128 GB DDR4 and multiple PCIe 4.0 slots for Ryzen CPUs

  • ProcessorAMD AM4 Sockets 3rd and 2nd AMD Ryzen/2nd and 1st Gen AMD Ry
  • ChipsetAMD X570
  • CPU socketAM4
  • Max supported RAM128 GB
  • PCI slots2 x PCIe 4.0 x16 (x16 or dual x8) 1 x PCIe 4.0 x1 2 x PCIe 3
  • SATA and RAID support8XSATA III interface
  • Supports up to 128GB DDR4 memory for heavy multitasking
  • AMD X570 chipset enables PCIe 4.0 on two x16 slots
  • Eight SATA III ports give ample storage connectivity
  • Intel i211AT LAN provides reliable wired networking
  • ATX form factor 30.5x24.4cm fits standard cases

ASUS ROG Crosshair VIII Hero AM4 ATX

This motherboard uses the AMD X570 chipset and an AM4 socket to support 3rd and 2nd generation AMD Ryzen processors, plus 2nd and 1st generation AMD Ryzen with Radeon Vega Graphics. It fits a standard ATX form factor measuring 30.5 by 24.4 centimetres and provides four DDR4 slots for up to 128GB of memory.

Suits AMD Ryzen AM4 builds needing PCIe 4.0 lanes

The board delivers two PCIe 4.0 x16 slots and one PCIe 4.0 x1 slot from the CPU, plus additional PCIe 3.0 lanes from the chipset. Builders who need a newer socket, more than 128GB memory capacity, or integrated wireless networking should look at a different platform.

X570 chipset with PCIe 4.0 CPU lanes

The AMD X570 chipset enables PCIe 4.0 on the primary x16 and x1 slots directly from the processor. This single specification decides whether the board matches a build that requires that bandwidth for graphics or add-in cards.

How it compares

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

Price $185.99
Cheaper than about 56% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineASUS ROG CROSSHAIR VIII HERO
Model nameASUS ROG CROSSHAIR VIII HERO
Processor
ProcessorAMD AM4 Sockets 3rd and 2nd AMD Ryzen/2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics Processors
CPU socketAM4
ChipsetAMD X570
Memory
Max supported RAM128 GB
Storage
SATA and RAID support8XSATA III interface
Connectivity
Ethernet controllerIntel i211AT
Ports & slots
PCI slots2 x PCIe 4.0 x16 (x16 or dual x8)
1 x PCIe 4.0 x1
2 x PCIe 3.0 x16 (x16 or dual x8)
1 x PCIe 3.0 x16 (x8 mode)
AMD X570 chipset
1 x PCIe 4.0 x16

Questions about this item

Which AMD Ryzen processor generations does the AM4 socket on this board support?

The AM4 socket accepts 3rd and 2nd generation Ryzen CPUs, plus 2nd and 1st generation Ryzen with Radeon Vega graphics.

Will my existing PCIe 3.0 graphics card run at full speed in the available slots?

Two PCIe 3.0 x16 slots operate at x16 or dual x8, and one runs at x8 mode, so a PCIe 3.0 card will work at its native bandwidth.

How can I confirm the four DDR4 slots are all active after installing 128 GB of memory?

The BIOS memory information screen will show 128 GB detected across four channels, and the POST code will complete without memory errors.

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