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Silver 1U rackmount barebone server chassis with front drive bays

ASUS

ASUS RS500A-E12-RS4U-8TW barebone server, 1U, AMD EPYC 9004, 24 DDR5 slots, 4 NVMe, 3 PCIe 5.0

SKU CH-72H2-7QDA4 MPN RS500A-E12-RS4U-8TW

1U rackmount barebones server supporting AMD EPYC 9004 processors with 24 DDR5 slots, four NVMe bays and three PCIe 5.0 expansion slots

  • ProcessorSupports AMD EPYC 9004 Series Processors (up to 400 W)
  • Installed RAMNo Memory Installed
  • Form factor1U Rackmount
  • Processor socketSocket SP5
  • Target workloadGeneral Purpose Server
  • Preinstalled processorNo CPU Installed
  • Supports up to 400 W AMD EPYC 9004 processors
  • 24 DDR5 slots deliver 6 TB maximum memory capacity
  • Four front NVMe bays plus two M.2 slots for dense storage
  • Three PCIe 5.0 slots plus OCP 3.0 for high-bandwidth expansion
  • Dual single-slot GPU support for AI and HPC workloads

1U AMD EPYC 9004 barebone

The ASUS RS500A-E12-RS4U-8TW is a 1U rackmount barebone designed for general-purpose server workloads. It accepts a single AMD EPYC 9004 series processor with a TDP up to 400W using the SP5 socket. The platform provides 24 DDR5 RDIMM slots across 12 channels supporting speeds up to 4800 MHz. It targets deployments needing dense compute and storage in a single rack unit.

Verify CPU cooler clearance and GPU power

Confirm the chosen EPYC 9004 processor fits the 400W TDP limit cooled by the enhanced volume air cooling heatsink. Ensure any single-slot GPU cards selected do not exceed the power budget of the three PCIe 5.0 slots and OCP 3.0 connector. The system ships without CPU memory or storage installed so those components must be sourced separately. Front bays accept four NVMe SATA or SAS drives and two M.2 modules.

EVAC heatsink and front NVMe access

An enhanced volume air cooling heatsink handles processors up to 400W within the 1U chassis. Four front-panel drive bays provide direct access to NVMe SATA or SAS storage without opening the case. Three PCIe 5.0 expansion slots include two full-height half-length x16 links one low-profile half-length x16 link and one low-profile half-length x8 link plus an OCP 3.0 socket for networking. Onboard management uses ASPEED AST2600 with ASMB11-iKVM remote control.

How it compares

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

Price $1,586.99
Cheaper than about 76% 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

Product
Brand nameASUS
Model nameRS500A-E12-RS4U-8TW
Target workloadGeneral Purpose Server
Processor
ProcessorSupports AMD EPYC 9004 Series Processors (up to 400 W)
Processor socketSocket SP5
Preinstalled processorNo CPU Installed
Max supported CPUs1
Processor detailsSupports 4th Generation AMD EPYC Processors with AMD 3D V-Cache technology
AMD EPYC 9004 Series Processors (Air cool with EVAC up to 400 W)
Memory
Installed RAMNo Memory Installed
RAM slots24 × 288Pin
Maximum supported memory6 TB
Supported memoryDDR5 4800/4400/4000/3600 RDIMM/ 3DS RDIMM
Memory channels12 Channel
Storage
Preinstalled storageNo Storage Installed
SATA ports4 x SATA/SAS/NVME
M.2 slots2
3.5" bays4 × 3.5 in/2.5 in
Connectivity
Primary LAN controllerIntel I350-AM2
Top LAN speed1 Gigabit
Ports & slots
PCIe slotsUp to 3 PCIe Gen5 slots + 1 OCP3.0
1 x PCIe x16 slot (Gen5 x16 link, FH, HL)
1 x PCIe x16 slot (Gen5 x16 link, LP, HL)
1 x PCIe x16 slot (Gen5 x8 link, LP, HL)
1 x OCP3.0 socket (Gen5 x16 link)
Front USB ports2 x USB 3.2 Gen1
VGA ports1 x VGA (Front), 1 x VGA (Rear)
Rear USB ports2 x USB 3.2 Gen1
Ethernet port2 × 1GbE
Power
Power supply800 W Redundant 1+1, 80 Plus
Size & build
Form factor1U Rackmount
Product dimensions33.17 in × 17.68 in × 1.73 in
Product weight28.99 lb (13.1 kg)
Shipping weight18.15 kg
Package size843 × 449 × 191 mm
Compatibility
Support gpusUp to 2 single-slot GPU cards

Questions about this item

Does the ASUS RS500A-E12-RS4U-8TW include a CPU, memory or storage drives, and what must be purchased separately?

The barebone arrives without an AMD EPYC 9004 processor, without DDR5 RDIMM or 3DS RDIMM modules and without any SATA, SAS or NVMe drives. You must supply one Socket SP5 CPU up to 400 W, up to 24 DDR5 modules for a maximum of 6 TB across 12 channels, and up to four front NVMe drives plus two M.2 devices.

Which AMD EPYC 9004 processor should I choose for this single-socket 1U server?

Select any 4th Generation AMD EPYC 9004 series processor that fits the 400 W TDP limit and the EVAC air-cooling design. The socket is SP5, only one CPU is supported, and the platform runs 12-channel DDR5 at 4800, 4400, 4000 or 3600 MT/s depending on the specific processor chosen.

What does the three PCIe 5.0 slots specification mean for expansion cards in this chassis?

You get one full-height half-length x16 Gen5 slot, two low-profile half-length slots (one x16 Gen5, one x8 Gen5) and an OCP 3.0 socket with a Gen5 x16 link. This layout supports up to two single-slot GPUs and high-bandwidth networking or storage add-in cards, all running at PCIe 5.0 speeds.

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