AMD Instinct MI355X Platform vs HPE ProLiant Compute XD685 (Instinct MI355X)
Accelerator configuration, aggregate memory, bandwidth and power, side by side.
Specifications
| Specification | AMD Instinct MI355X Platform | HPE ProLiant Compute XD685 (Instinct MI355X) |
|---|---|---|
| Vendor | AMD | HPE |
| Part number | — | — |
| Form factor | baseboard | rack |
| Released | 2025 | 2025 |
| Accelerator | 8x Instinct MI355X | 8x Instinct MI355X |
| Aggregate memory | 2.3 TB | 2.3 TB |
| Aggregate bandwidth | 64.0 TB/s | 64.0 TB/s |
| System power | — | — |
| Interconnect | 4th Gen AMD Infinity Fabric, eight fully connected OAM modules on an OCP UBB design | 4th Gen AMD Infinity Fabric across the eight-OAM OCP baseboard; 4x FHHL PCIe Gen5 x16 slots for fabric, NIC or DPU |
Rows shown in grey are identical between the two.
AMD Instinct MI355X Platform
AMD's eight-GPU building block, integrating eight fully connected MI355X OAM modules on an industry-standard OCP universal baseboard over fourth-generation Infinity Fabric. AMD publishes the platform totals of 2.3 TB of HBM3E and 64 TB/s of aggregate memory bandwidth, both of which are exactly eight times the per-GPU figures, which is why the precision values here are also eight times AMD's published per-GPU specification rather than a separate platform table, since AMD provides none. Sparse figures appear only for the four datatypes where AMD publishes a structured-sparsity number, which are FP8, FP16, BF16 and INT8; AMD gives no sparsity figure for MXFP4 or MXFP6, so neither does this row. Supported in both air-cooled UBB servers and direct liquid cooled platforms. AMD publishes no platform power figure.
Vendor product pageHPE 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.
Vendor product page