Lenovo ThinkSystem SR680a V4 vs NVIDIA HGX B300 8-GPU
Accelerator configuration, aggregate memory, bandwidth and power, side by side.
Specifications
| Specification | Lenovo ThinkSystem SR680a V4 | NVIDIA HGX B300 8-GPU |
|---|---|---|
| Vendor | Lenovo | NVIDIA |
| Part number | 7DMK | — |
| Form factor | rack | baseboard |
| Released | — | 2025 |
| Accelerator | 8x B300 | 8x B300 |
| Aggregate memory | — | 2.1 TB |
| Aggregate bandwidth | — | 64.0 TB/s |
| System power | — | — |
| Interconnect | One NVIDIA HGX B300 SXM baseboard, which Lenovo pairs with fast interconnects between GPUs, CPUs and networking | NVLink 5.0 / NVSwitch 4.0 |
Rows shown in grey are identical between the two.
Lenovo ThinkSystem SR680a V4
Lenovo's Blackwell Ultra machine, an 8U server developed in-house around eight NVIDIA HGX B300 SXM GPUs and two Intel Xeon 6700P processors reaching 86 cores at up to 350 W. Notably it is designed for air cooling, where most B300 machines in this catalogue are liquid cooled or need direct-to-chip plumbing, and it carries that with 21 hot-swap fans, six at the front for CPUs and memory and fifteen at the rear for drives and the GPU subsystem. Power is six or eight hot-swap supplies, either 3,200 W AC or 3,800 W high-voltage AC or DC, in N+1 or N+N redundancy. The chassis is 447 by 351 by 924 mm at up to 124.7 kg, the heaviest of Lenovo's 8U accelerator servers. Lenovo publishes no system power draw, no accelerator memory total and no system throughput figure; its per-GPU B300 table matches NVIDIA's own specification for the baseboard, which is linked here.
Vendor product pageNVIDIA HGX B300 8-GPU
The eight-GPU Blackwell Ultra baseboard OEMs build around. NVIDIA publishes both a dense and a sparse figure for every tensor precision here, and for FP4 the two are not a factor of two apart: dense rose by half over the B200, from 72 to 108 PFLOPS, while sparse stayed at 144. Total memory is NVIDIA's own 2.1 TB rather than the 2.304 TB that eight 288 GB GPUs would suggest. Memory bandwidth of 64 TB/s is the one derived number, being eight times the B300's published 8 TB/s, because NVIDIA gives no board-level HBM figure. No INT8 row is recorded: NVIDIA's table gives 3 POPS sparse for this board while our B300 chip entry implies 36 POPS dense, the two cannot both be right, and the question is open rather than guessed at. NVIDIA publishes no baseboard power figure, so total power is blank.
Vendor product page