HBM4 capacity per Rubin GPU package: 288 GB across eight stacks, 19.2 TB/s aggregate (NVIDIA shipping specification)
~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. |
|---|---|
| Scope | 2.4 TB/s per stack is this guide's derivation (19.2 TB/s / 8 stacks). NVIDIA's January 2026 launch specification said up to 22 TB/s aggregate. The rack figure is 20.7 TB of HBM4 at 1,400 TB/s. |
| Caveat | JEDEC's HBM4 base rate is about 2.0 TB/s per stack. |
| As of | 2026-10 |
| Source | NVIDIA Vera Rubin NVL72 product page (checked 2026-10-16) · Specifications: Rubin GPU, 288 GB HBM4 | 19.2 TB/s; NVL72 rack, 20.7 TB HBM4 | 1,400 TB/s |
| Review | checking…review by 2027-01-31 · standard cadence |
| Recorded changes | last 2026-10-15 · 3 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.