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4U rackmount server chassis with four redundant power supplies and ten front drive bays

Supermicro

Supermicro SYS-420GU-TNXR 4U barebone server, dual Xeon, 32 DDR4 slots, 4 GPU, 10 NVMe bays, 4×3000W

SKU CH-Q673-F70ZZ MPN SYS-420GU-TNXR

A 4U rackmount barebone for AI and HPC workloads, supporting dual Xeon processors, up to 8 TB of DDR4 ECC memory, four NVIDIA HGX A100 GPUs with NVLink.

  • Form Factor4U Rackmount
  • WorkloadAI/ML/HPC
  • CPU TypeIntel Xeon
  • CPU SocketLGA 4189
  • Installed CPUNo CPU Installed
  • Max Processors2
  • Dual-socket LGA-4189 platform supports up to 40 cores and 80 threads per CPU
  • 32 DDR4 3200 ECC slots scale memory capacity to 8 TB
  • Four NVIDIA HGX A100 GPUs linked by NVLink for high-speed GPU communication
  • Ten 2.5-inch hot-swap bays accept NVMe or SATA drives
  • Four redundant 3000 W Titanium power supplies deliver reliable power

Dual Xeon 4U server for AI and HPC

This 4U barebone server is built for dual Intel Xeon Scalable processors and up to four NVIDIA HGX A100 GPUs. It targets AI training, machine learning and high-performance computing workloads that demand dense GPU acceleration. Buyers who need a compact tower or single-socket platform will not find a match here.

8 TB DDR4 headroom and ten NVMe bays

Thirty-two DDR4 3200 slots support up to 8 TB of ECC memory, giving large-model training ample capacity before swapping. Ten hot-swap 2.5-inch bays accept NVMe or SATA drives, while a single M.2 slot takes one NVMe or SATA module. Systems requiring more than ten front drives or multiple M.2 devices must look elsewhere.

Four 3000 W titanium supplies and six PCIe 4.0 slots

Four redundant 3000 W titanium-level power supplies deliver the headroom needed for dual 270 W CPUs plus four SXM GPUs. Six low-profile PCIe 4.0 x16 slots remain for additional networking or storage controllers. The bundle includes no CPUs, memory, GPUs or drives, so integrators must source every active component separately.

Highlights

  • Dual-socket LGA-4189 platform supports up to 40 cores and 80 threads per CPU
  • 32 DDR4 3200 ECC slots scale memory capacity to 8 TB
  • Four NVIDIA HGX A100 GPUs linked by NVLink for high-speed GPU communication
  • Ten 2.5-inch hot-swap bays accept NVMe or SATA drives
  • Four redundant 3000 W Titanium power supplies deliver reliable power

Specifications

BrandSUPERMICRO
ModelSYS-420GU-TNXR
Form Factor4U Rackmount
WorkloadAI/ML/HPC
CPU TypeIntel Xeon
CPU SocketLGA 4189
Installed CPUNo CPU Installed
Max Processors2
CPU FeaturesUp to 40C/80T; Up to 60MB Cache per CPU
Supports up to 270W TDP CPUs (Air Cooled)
Memory Slots32 x 288Pin
Installed Memory SizeNo Memory Installed
Max Memory SupportedUp to 8TB: 32 x 256 GB DRAM
Memory Type SupportedDDR4 3200
ECC SupportedYes
Installed HDDNo Storage Installed
M.21 x M.2 NVMe OR 1 x M.2 SATA3
GPU/VPUMax GPU Count: 4 onboard GPU(s)
Supported GPU: NVIDIA SXM: HGX A100 4-GPU (80GB)
CPU-GPU Interconnect: PCIe 4.0 x16 CPU-to-GPU Interconnect
GPU-GPU Interconnect: NVIDIA NVLink
PCI Express6 x PCIe 4.0 x16 LP slot(s)
First LANIntel X710
Max. LAN Speed10 Gigabit
Hot-Swap Bays10 x 2.5" hot-swap NVMe/SATA drive bays (10 x 2.5" NVMe hybrid)
VGA1
RJ452
Max. Power4x 3000W Redundant Titanium Level power supplies
TemperatureOperating Temperature: 10°C ~ 35°C (50°F ~ 95°F)
Non-operating Temperature: -40°C to 60°C (-40°F to 140°F)
HumidityOperating Relative Humidity: 8% to 90% (non-condensing)
Non-operating Relative Humidity: 5% to 95% (non-condensing)
FeaturesCryptographically Signed Firmware
Secure Boot
Secure Firmware Updates
Automatic Firmware Recovery
Supply Chain Security: Remote Attestation
Runtime BMC Protections
System Lockdown
Dimensions7" x 17.67" x 32.79"
Weight105 lbs.
Shipping weight63.50 kg
Package size1260 × 700 × 370 mm

Questions about this item

Will my existing DDR4-3200 ECC RDIMMs work in the 32 DDR4 slots of the SYS-420GU-TNXR?

Yes, the board accepts DDR4 3200 ECC RDIMMs and LRDIMMs across all 32 slots, so compatible modules you already own can be reused.

How can I confirm the four HGX A100 GPUs are linked at full speed after installation?

Run nvidia-smi nvlink --status; each GPU pair should show an active NVLink connection running at the expected PCIe 4.0 x16 CPU-to-GPU rate.

Does the barebone include the four 3000 W Titanium power supplies and the 10 hot-swap 2.5-inch NVMe drive trays?

Yes, the 4U chassis ships with four redundant 3000 W Titanium PSUs and ten 2.5-inch hot-swap NVMe/SATA trays installed; CPUs, memory and GPUs are not included.

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