HPE ProLiant Compute XD685 (Instinct MI355X)
The eight-way XD685 in its AMD Instinct MI355X configuration, liquid cooled, with accelerator kit S6J64A. This is an all-AMD machine, pairing eight MI355X OAM modules with two fifth-generation AMD EPYC processors. No chassis part number is recorded: HPE names the accelerator kit but never states which chassis it requires, and the two candidates differ. Compute comes from AMD's eight-GPU Instinct platform, where the sparse figures cover only the four datatypes AMD publishes them for, being FP8, FP16, BF16 and INT8; AMD gives no structured-sparsity figure for MXFP4 or MXFP6. HPE publishes no system power draw for the XD685, only twelve 3,000 W Titanium supplies, so nothing is summed.
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Systems built on this design
2 configurationsBuilt on the AMD Instinct MI355X Platform baseboard, so accelerator performance matches the reference. Chassis, CPU, memory and cooling are this vendor's own.
System Details
GPU Configuration
System Specifications
Precision Performance Breakdown
| Precision | System Performance | Per GPU | Efficiency |
|---|---|---|---|
| 629 TFLOPS | 79 TFLOPS | — | |
| 1,258 TFLOPS | 157 TFLOPS | — | |
| 20,133 TFLOPS | 2,517 TFLOPS | — | |
| 20,133 TFLOPS | 2,517 TFLOPS | — | |
| 40,266 TFLOPS | 5,033 TFLOPS | — | |
| 80,530 TFLOPS | 10,066 TFLOPS | — | |
| 40,266 TOPS | 5,033 TOPS | — | |
| FP6 | 80,530 TFLOPS | 10,066 TFLOPS | — |
Where a vendor states a basis, the figure shown is the dense one, and any figure it publishes is listed separately. Vendors commonly headline the sparse number instead: for NVIDIA's 2:4 structured sparsity that is exactly twice the dense figure, though other vendors' sparse modes do not all follow that ratio.
Powered by AMD Instinct MI355X
This system utilizes 8 × AMD Instinct MI355X OAM GPUs, each delivering exceptional performance for AI and HPC workloads.
Per GPU TDP
1400W
Per GPU Memory
288 GB
Process Node
3nm/6nm
Architecture
CDNA 4
Documentation & Resources
Flopper Spec Sheet
HPE ProLiant Compute XD685 (Instinct MI355X) specifications, generated from our database. Printable.
Vendor product page
HPE ProLiant Compute XD685 (Instinct MI355X) documentation
HPE Compute XD690 QuickSpecs (a50009220enw, V6)
HPE • 2026-07-06
Typical Use Cases
The HPE ProLiant Compute XD685 (Instinct MI355X) runs 8× Instinct MI355X GPUs over 4th Gen AMD Infinity Fabric across the eight-OAM OCP baseboard; 4x FHHL PCIe Gen5 x16 slots for fabric, NIC or DPU, delivering 40,266 TFLOPS FP8 dense.