per-GPU HBM bandwidth, HBM3E (B200/B300 class) → HBM4 (Vera Rubin shipping spec, 8 stacks), ~2.4x
~8 → 19.2 TB/sobserved
| 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 | Shipping spec for eight HBM4 stacks per Vera Rubin GPU, about 2.4 TB/s per stack. NVIDIA announced up to ~22 TB/s at launch (CES and GTC 2026). The B200/B300 figure is the ~8 TB/s HBM3E reference. |
| As of | 2026-10 |
| Source | NVIDIA, Vera Rubin NVL72 product page (shipping specification) · Specifications: 288 GB HBM4, 19.2 TB/s per GPU |
| Review | checking…review by 2027-01-15 · standard cadence |
| Recorded changes | last 2026-10-15 · 2 revisions tracked |
| Claim id | per-gpu-hbm-bandwidth-hbm3e-b200-b300-class |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.