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Silver 4U rackmount server chassis with front drive bays and rear power supplies

ASRock Rack

ASRock Rack 4U8G-GENOA2 barebone server dual SP5 8 GPU 20 bay

SKU CH-WKG7-WM7XF MPN 4U8G-GENOA2

4U rackmount barebone with dual SP5 sockets, eight full-height GPU slots and twenty 2.5-inch SATA plus four NVMe drive bays

  • Dual AMD EPYC 9005/9004 processors supported on dual SP5 sockets
  • 8 full-height dual-slot PCIe 5.0 x16 GPU slots for dense acceleration
  • 20 hot-swap 2.5-inch SATA drive bays plus 4 NVMe bays
  • 12 DDR5 RDIMM slots per socket with 1 DPC architecture
  • 1600W 80-PLUS Platinum 3+1 redundant CRPS power supply

Dual-Socket SP5 Platform

The ASRock Rack 4U8G-GENOA2 is a 4U rackmount barebones server built for dual AMD EPYC 9004 and 9005 series processors. It targets organisations deploying dense GPU compute or storage-heavy workloads in a single chassis. The system arrives with a redundant 1600W 80-PLUS Platinum power supply.

Eight PCIe 5.0 x16 Slots

The defining specification is the eight full-height full-length dual-slot PCIe 5.0 x16 expansion slots. This density allows up to eight double-width accelerators to run at full bandwidth simultaneously. An additional full-height half-length PCIe 5.0 x8 slot and one OCP NIC 3.0 slot provide further I/O flexibility.

Twenty-Five Drive Bays Total

Storage capacity combines four hot-swap 2.5-inch NVMe bays running PCIe 5.0 x4 with twenty hot-swap 2.5-inch SATA bays. Two internal M.2 sockets accept PCIe 3.0 x4 or SATA devices. Memory scales across twenty-four DDR5 RDIMM slots in a 1DPC configuration.

How it compares

Measured against everything we stock in Barebone Servers & DIY Kits, at today’s prices. Recalculated every night.

Price $5,566.99
Pricier than about 78% of the 532 comparable items (median $2,503.49).

New to this? Buying server hardware with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Size & build
Shipping weight60.78 kg
Package size1143 × 660 × 533 mm

Questions about this item

How does the dual SP5 socket layout translate into real-world compute density?

Two AMD EPYC 9004 or 9005 series processors fit side by side, each with up to 96 cores, so a single 4U box delivers the thread count of a small cluster.

What does the PCIe 5.0 x16 slot limit mean for GPU throughput?

Each of the eight full-height slots runs at PCIe 5.0 x16, capping GPU-to-CPU bandwidth at the 5.0 x16 ceiling rather than a slower generation.

How deep must the rack be to accommodate the 20 hot-swap drive bays?

The chassis is a standard 4U rackmount depth; the 20 front 2.5-inch SATA bays plus four NVMe bays sit behind a single bezel, so any cabinet that accepts 4U servers will fit it.

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