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Dell PowerEdge XE8640

The Dell PowerEdge XE8640 is a 4U dual-socket GPU server built for AI and machine-learning training, inferencing and HPC modeling and simulation. Four NVIDIA HGX H100 80GB 700W SXM5 GPUs are fully linked by NVLink for up to 900GB/s of GPU-to-GPU bandwidth, driven by two 4th or 5th Gen Intel Xeon Scalable processors with up to 64 cores each. It has 32 DDR5 RDIMM slots for up to 4TB at up to 5600 MT/s, up to 8x 2.5" SAS/SATA/NVMe or 8x E3.S NVMe SSDs on PERC H965i, and up to four PCIe Gen5 x16 slots. CPUs are air cooled and GPUs use closed-loop liquid-assisted air cooling, so no facility water is needed. Four Titanium 2800W or 3200W PSUs and iDRAC9 complete it. Fully configurable.

Looking to compare generations? See the Gen 15 Dell PowerEdge R750xa, or compare Gen 16 models: Dell PowerEdge R760xa and Dell PowerEdge R760.

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  • Form Factor: 4U Rack
  • Processors: Up to 2x 4th/5th Gen Intel Xeon Scalable (up to 64 cores)
  • Memory: 32x DDR5 RDIMM slots, up to 4TB
  • Memory Speed: Up to 5600 MT/s
  • Storage: Up to 8x 2.5" SAS/SATA/NVMe or 8x E3.S NVMe SSDs
  • Expansion: Up to 4x PCIe Gen5 x16 slots
  • GPU Support: 4x NVIDIA HGX H100 80GB 700W SXM5 with NVLink
  • Networking: 2x 1GbE LOM, 1x OCP 3.0 (x8)
  • Management: iDRAC9
  • Cooling: Air (CPU) + liquid-assisted air (GPU)
  • Power: 4x Titanium PSUs, 2800W or 3200W (3+1)

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Dell PowerEdge XE8640 vs R750xa: Specs & Key Differences

Feature PowerEdge XE8640 PowerEdge R750xa
Processors Up to 2x 4th/5th Gen Intel Xeon Scalable (up to 64 cores) Up to 2x 3rd Gen Intel Xeon Scalable (up to 40 cores)
Memory 32x DDR5 RDIMM slots, up to 4TB 32x DDR4 DIMM slots, up to 4TB LRDIMM, plus 16x PMem 200
Memory Speed Up to 5600 MT/s Up to 3200 MT/s
Storage Up to 8x 2.5" SAS/SATA/NVMe or 8x E3.S NVMe SSDs Up to 8x 2.5" SAS/SATA/NVMe
PCIe Up to 4x PCIe Gen5 x16 Up to 8x PCIe Gen4 slots (6x x16)
GPU Support 4x NVIDIA H100 SXM5 700W with NVLink Up to 4x 300W DW or 4x 150W SW front, plus 2x 75W SW rear
Networking 2x 1GbE LOM, 1x OCP 3.0 (x8) 2x 1GbE LOM, 1x OCP 3.0 (x8)
Management iDRAC9 iDRAC9
Cooling Air (CPU) + liquid-assisted air (GPU) Air, optional processor liquid cooling
Power 4x Titanium 2800W or 3200W (3+1) Redundant PSUs, 1400W to 2800W
Form Factor 4U Rack 2U Rack

Frequently Asked Questions

Four NVIDIA HGX H100 80GB SXM5 GPUs at 700W each, fully interconnected with NVLink for up to 900GB/s GPU-to-GPU bandwidth, with support for NVIDIA Multi-Instance GPU and GPUDirect Storage.

Two 4th Gen Intel Xeon Scalable processors with up to 56 cores or 5th Gen with up to 64 cores, and 32 DDR5 RDIMM slots for up to 4TB. Memory runs at up to 5600 MT/s with one DIMM per channel and 4400 MT/s with two.

Up to eight 2.5-inch SAS, SATA or NVMe SSDs, or up to eight E3.S NVMe SSDs at the front, on a PERC H965i controller, plus BOSS-N1 M.2 boot. Please specify your capacity needs when you submit your quote configuration.

The processors are air cooled, while the GPUs use closed-loop liquid-assisted air cooling, so no facility water to the rack is required. Four Titanium 2800W or 3200W power supplies run in 3+1 redundancy.

The XE8640 is a 4U SXM5 platform with four NVLink-connected H100 GPUs, DDR5-5600 memory and PCIe Gen5. The Gen 15 R750xa is a 2U server that takes up to four double-width PCIe GPUs, with DDR4-3200 memory, Optane PMem support and more PCIe Gen4 slots.

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