HBM4 capacity per Rubin GPU package at ~2.75 TB/s/stack = ~22 TB/s aggregate (the Rubin configuration, not the JEDEC ~2.0 TB/s/stack base)
~288 GBobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Caveat | 2.75 TB/s = Rubin config (22 TB/s ÷ 8× 36 GB stacks). JEDEC HBM4 base ~2.0 TB/s/stack; shipping 2026 HBM4 parts run ~2.56 (SK hynix) → ~2.8 (Micron) → up to ~3.3 (Samsung) TB/s/stack. |
| As of | 2026-07 |
| Source | NVIDIA Developer (Rubin platform) |
| Review | checking…review by 2026-10-06 · standard cadence |
| Recorded changes | last 2026-07-22 · 2 revisions tracked |
| Claim id | hbm4-capacity-per-rubin-class-package-at-2-75 |
Where the guide uses it
- 7.2 NVIDIA Accelerators: Hopper → Blackwell → Vera Rubin → Rubin Ultra → Feynman
- 7.7 Advanced Packaging & the Integration Substrate
← Full numbers register — every date-stamped figure in the guide, with revision history.