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.
We will point you at suppliers who have it. Free, and no signup.
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
Frequently asked questions
How much does the ProLiant Compute XD685 (Instinct MI355X) cost?
HPE sells the ProLiant Compute XD685 (Instinct MI355X) on quote through OEMs and resellers, and nobody rents a whole one by the hour. Renting its 8 Instinct MI355X accelerators separately at the cheapest live rate Flopper tracks, $5.99 per GPU-hour across 1 provider, comes to about $47.92 an hour for the equivalent capacity. Instinct MI355X rental prices →
How much power does the ProLiant Compute XD685 (Instinct MI355X) require?
HPE has not published a power figure for the ProLiant Compute XD685 (Instinct MI355X), and Flopper does not derive one from the accelerator count because the rest of the system draws power too.
How many GPUs are in the ProLiant Compute XD685 (Instinct MI355X)?
8. The ProLiant Compute XD685 (Instinct MI355X) carries 8 AMD Instinct MI355X OAM accelerators in a rack form factor, and every throughput figure on this page is the total across them. Instinct MI355X specifications →
Documentation & Resources
Need this system?
Tell us the quantity, timeframe and region. We reply by email with who can supply it.
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.