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 GBHBM4 per Rubin GPU at ~22 TB/s; trajectory H100 80 GB → H200 141 GB → B200 180 GB → B300 288 GB → Rubin Ultra 1 TB
80 → 288 GB → ~1 TBHBM capacity per accelerator package: H100 80 GB; B200 180 GB; B300 288 GB (HBM3E); Rubin Ultra ~1 TB HBM4E on a four-chiplet package (roadmap)
~8 → ~22 TB/sper-GPU HBM bandwidth, HBM3E (B200/B300 class) → HBM4 (Rubin, 8 stacks) — ~2.8x