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Silver 2U rackmount barebone server chassis, front drive bays visible

ASUS

ASUS RS520A-E12-RS12U-16W1G2.5R 2U barebone server

SKU CH-8HPV-MAE02 MPN RS520A-E12-RS12U-16W1G2.5R

2U rackmount barebone supports one AMD EPYC 9004 processor up to 400W, 24 DDR5 slots for 6TB, 16 SATA/SAS/NVME bays, dual 1600W 80 Plus supplies, and up to four single-slot GPUs

  • Form Factor2U Rackmount
  • WorkloadGeneral Purpose Server
  • CPU TypeSupports AMD EPYC 9004 Series Processors (up to 400W)
  • CPU SocketSocket SP5
  • Installed CPUNo CPU Installed
  • Max Processors1
  • Supports AMD EPYC 9004 processors up to 400W for high compute density
  • 24 DDR5 memory slots deliver up to 6TB capacity across 12 channels
  • 16 SATA/SAS/NVME bays plus 2 M.2 slots enable massive local storage
  • Up to 4 single-slot or 2 double-slot GPUs accelerate AI and HPC workloads
  • 1600W redundant 1+1 80 Plus power supply ensures continuous uptime

2U Rackmount Barebone for AMD EPYC 9004

This 2U rackmount barebone server supports a single AMD EPYC 9004 Series processor up to 400W on a Socket SP5 platform. It ships without CPU or memory, allowing custom configuration for general-purpose workloads. The chassis includes a 1600W redundant 1+1 power supply rated at 80 Plus.

Suits builders needing dense storage and GPU options

With 16 SATA/SAS/NVME bays, two M.2 slots and support for up to four single-slot or two double-slot GPU cards, it fits storage-heavy and accelerated compute tasks. Buyers who require dual-socket scaling should look elsewhere. The single 1 Gigabit LAN port also limits high-speed networking needs.

24 DDR5 slots with 12-channel architecture

The platform provides 24 x 288-pin slots supporting DDR5 4800/4400/4000/3600 RDIMM and 3DS RDIMM up to 6TB total capacity. This 12-channel memory subsystem is the decisive spec for memory-bandwidth-sensitive deployments.

Highlights

  • Supports AMD EPYC 9004 processors up to 400W for high compute density
  • 24 DDR5 memory slots deliver up to 6TB capacity across 12 channels
  • 16 SATA/SAS/NVME bays plus 2 M.2 slots enable massive local storage
  • Up to 4 single-slot or 2 double-slot GPUs accelerate AI and HPC workloads
  • 1600W redundant 1+1 80 Plus power supply ensures continuous uptime

Specifications

BrandASUS
ModelRS520A-E12-RS12U-16W1G2.5R
Form Factor2U Rackmount
WorkloadGeneral Purpose Server
CPU TypeSupports AMD EPYC 9004 Series Processors (up to 400W)
CPU SocketSocket SP5
Installed CPUNo CPU Installed
Max Processors1
CPU FeaturesSupports 4th Generation AMD EPYC Processors with AMD 3D V-Cache technology
AMD EPYC 9004 Series Processors (Air cool with STD HSK up to 400W)
Memory Slots24 x 288Pin
Installed Memory SizeNo Memory Installed
Max Memory Supported6TB
Memory Type SupportedDDR5 4800/4400/4000/3600 RDIMM/ 3DS RDIMM
Channel Supported12 Channel
Installed HDDNo Storage Installed
Serial ATA16 x SATA/SAS/NVME
M.22
Support GPUsUp to 4 single-slot or 2 double-slot GPU cards
PCI ExpressUp to 5 PCIe Gen5 slots + 1 OCP3.0
2 x PCIe Gen5 x16, FHFL or 4 x PCIe Gen5 x8, FHFL
1 x PCIe Gen5 x8, LP
1 x OCP 3.0 Slot ( (PCIe Gen5 x16)
First LANIntel I350-AM2
Max. LAN Speed1 Gigabit
2.5" Bays2 x 2.5" SATA hot-swap drive bays (Rear)
3.5" Bays12 x 3.5" hot-swap drive bays (Front)
Front USB2 x USB 3.2 Gen1
VGA1 x VGA (Front), 1 x VGA (Rear)
Rear USB2 x USB 3.2 Gen1
RJ452 x 1GbE
Max. Power1600W Redundant 1+1, 80 Plus
Dimensions33.17" x 17.68" x 3.47"
Weight39.57 lbs.
Shipping weight18.15 kg
Package size843 × 449 × 191 mm

Questions about this item

Which AMD EPYC 9004 processor and DDR5 RDIMM modules must I supply for this barebone?

Install one Socket SP5 AMD EPYC 9004 series CPU up to 400W and populate the 24 288-pin slots with DDR5 4800/4400/4000/3600 RDIMM or 3DS RDIMM across 12 channels.

Can my existing SATA and SAS drives use the 16 bays while I add NVMe U.2 or M.2 devices?

The 16 bays accept SATA, SAS and NVMe together, and the two M.2 slots provide additional NVMe capacity without adapter cards.

How do I confirm the redundant 1600W power supply and Intel I350-AM2 LAN are operating after build?

Check the front-panel power-supply LEDs for green on both units and verify a 1 Gigabit link light on the I350-AM2 ports in the OS network stack.

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