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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.

  • ProcessorIntel Xeon
  • Graphics processorMax GPU Count: 4 onboard GPU(s) Supported GPU: NVIDIA SXM: H
  • Installed RAMNo Memory Installed
  • Form factor4U Rackmount
  • Processor socketLGA 4189
  • Target workloadAI/ML/HPC
  • 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.

How it compares

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

Price $10,117.99
Pricier than about 88% 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 nameSUPERMICRO
Model nameSYS-420GU-TNXR
Target workloadAI/ML/HPC
Processor
ProcessorIntel Xeon
Processor socketLGA 4189
Preinstalled processorNo CPU Installed
Max supported CPUs2
Processor detailsUp to 40C/80T; Up to 60 MB Cache per CPU
Supports up to 270 W TDP CPUs (Air Cooled)
Memory
Installed RAMNo Memory Installed
RAM slots32 × 288Pin
Maximum supported memoryUp to 8 TB: 32 × 256 GB DRAM
Supported memoryDDR4 3200
ECC supportYes
Storage
Preinstalled storageNo Storage Installed
M.2 slots1 x M.2 NVMe OR 1 x M.2 SATA3
Hot-swap drive bays10 × 2.5 in hot-swap NVMe/SATA drive bays (10 × 2.5 in NVMe hybrid)
Graphics
Graphics processorMax GPU Count: 4 onboard GPU(s)
Supported GPU: NVIDIA SXM: HGX A100 4-GPU (80 GB)
CPU-GPU Interconnect: PCIe 4.0 x16 CPU-to-GPU Interconnect
GPU-GPU Interconnect: NVIDIA NVLink
Connectivity
Primary LAN controllerIntel X710
Top LAN speed10 Gigabit
Ports & slots
PCIe slots6 x PCIe 4.0 x16 LP slot(s)
VGA ports1
Ethernet port2
Power
Power supply4x 3000 W Redundant Titanium Level power supplies
Size & build
Form factor4U Rackmount
Product dimensions7 in × 17.67 in × 32.79 in
Product weight105 lb (47.6 kg)
Shipping weight63.50 kg
Package size1260 × 700 × 370 mm
Environment & compliance
Temperature rangeOperating Temperature: 10 °C to 35 °C (50 °F to 95 °F)
Non-operating Temperature: -40 °C to 60 °C (-40 °F to 140 °F)
Humidity rangeOperating Relative Humidity: 8% to 90% (non-condensing)
Non-operating Relative Humidity: 5% to 95% (non-condensing)

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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