NVIDIA A800 SXM4 80GB

The A800 SXM4 80GB is the export-compliant counterpart to NVIDIA's flagship Ampere data center accelerator, created in 2022 so that NVIDIA could continue supplying the Chinese market after United States export controls capped the permitted chip-to-chip interconnect rate. Silicon and memory are unchanged from the A100 it derives from; the sole difference is a deliberately reduced NVLink rate, which leaves single-GPU performance intact while slowing the all-to-all communication that very large multi-GPU training runs depend on. In the SXM module form factor it mounts on an HGX baseboard in groups of four or eight rather than plugging into a PCIe slot, giving it a higher power ceiling and faster memory than the PCIe card version of the same part.