Supermicro
Supermicro SYS-420GU-TNXR 4U barebone server, dual Xeon, 32 DDR4 slots, 4 GPU, 10 NVMe bays, 4×3000W
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
| Brand | SUPERMICRO |
|---|---|
| Model | SYS-420GU-TNXR |
| Form Factor | 4U Rackmount |
| Workload | AI/ML/HPC |
| CPU Type | Intel Xeon |
| CPU Socket | LGA 4189 |
| Installed CPU | No CPU Installed |
| Max Processors | 2 |
| CPU Features | Up to 40C/80T; Up to 60MB Cache per CPU Supports up to 270W TDP CPUs (Air Cooled) |
| Memory Slots | 32 x 288Pin |
| Installed Memory Size | No Memory Installed |
| Max Memory Supported | Up to 8TB: 32 x 256 GB DRAM |
| Memory Type Supported | DDR4 3200 |
| ECC Supported | Yes |
| Installed HDD | No Storage Installed |
| M.2 | 1 x M.2 NVMe OR 1 x M.2 SATA3 |
| GPU/VPU | Max 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 Express | 6 x PCIe 4.0 x16 LP slot(s) |
| First LAN | Intel X710 |
| Max. LAN Speed | 10 Gigabit |
| Hot-Swap Bays | 10 x 2.5" hot-swap NVMe/SATA drive bays (10 x 2.5" NVMe hybrid) |
| VGA | 1 |
| RJ45 | 2 |
| Max. Power | 4x 3000W Redundant Titanium Level power supplies |
| Temperature | Operating Temperature: 10°C ~ 35°C (50°F ~ 95°F) Non-operating Temperature: -40°C to 60°C (-40°F to 140°F) |
| Humidity | Operating Relative Humidity: 8% to 90% (non-condensing) Non-operating Relative Humidity: 5% to 95% (non-condensing) |
| Features | Cryptographically Signed Firmware Secure Boot Secure Firmware Updates Automatic Firmware Recovery Supply Chain Security: Remote Attestation Runtime BMC Protections System Lockdown |
| Dimensions | 7" x 17.67" x 32.79" |
| Weight | 105 lbs. |
| Shipping weight | 63.50 kg |
| Package size | 1260 × 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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