HPE ProLiant Compute XD685 (Instinct MI355X) vs Ingrasys GB2281A
Both are built on the NVIDIA Instinct MI355X Platform baseboard, so their accelerator performance is identical rather than merely similar. The choice between them is chassis, cooling, expansion and supplier, not FLOPS.
What actually differs
| Specification | HPE ProLiant Compute XD685 (Instinct MI355X) | Ingrasys GB2281A |
|---|---|---|
| Vendor | HPE | Ingrasys |
| Part number | — | GB2281A |
| Form factor | rack | rack |
| Released | 2025 | — |
| Accelerator | 8x Instinct MI355X | 8x Instinct MI355X |
| Aggregate memory | 2.3 TB | — |
| Aggregate bandwidth | 64.0 TB/s | — |
| System power | — | — |
| Interconnect | 4th Gen AMD Infinity Fabric across the eight-OAM OCP baseboard; 4x FHHL PCIe Gen5 x16 slots for fabric, NIC or DPU | Eight MI355X OAM modules on a UBB 2.0 universal baseboard, fully connected by AMD Infinity Fabric mesh; eight PCIe Gen5 x16 low-profile or half-length slots for networking |
Rows shown in grey are identical between the two.
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.
Vendor product pageIngrasys GB2281A
Ingrasys, the data centre arm of Foxconn, builds this as its AMD accelerator node: eight Instinct MI355X modules on a UBB 2.0 universal baseboard connected by Infinity Fabric mesh. The dimensions give away who it is for. At 524.3 mm wide and 93.5 mm high it is an Open Compute 21 inch node at two OpenU, not a 19 inch rack unit, which is how these reach hyperscale buyers rather than enterprise racks. Storage is sixteen E1.S NVMe bays, expansion eight PCIe Gen5 x16 slots, management an AST2600, and cooling is direct liquid to the accelerators with four 80 mm fans in N+1 for everything else. Ingrasys publishes no power figure and no throughput for the node. It does quote 2.3 TB of HBM3E and 64 TB/s of aggregate bandwidth, but for the AMD platform rather than for this product, so those are on the linked platform entry where AMD publishes them.
Vendor product page