B300
NVIDIA's later Blackwell-generation GPU, the memory-expanded step above B200 and a reference point for how per-GPU HBM capacity and rack power are climbing each generation.
Current numbers
~288 GBShipping Rubin GPU: 288 GB HBM4 at 19.2 TB/s, flat from B300; H100 80 GB; Rubin Ultra announced 1 TB
~8 → 19.2 TB/sPer-GPU HBM bandwidth, HBM3E (B200/B300) to HBM4 (shipping Vera Rubin, 8 stacks): ~2.4x
80 → 288 GBPer-GPU HBM on shipping parts: H100 80 GB, HGX B200 180 GB, B300 288 GB, Vera Rubin 288 GB