per-GPU usable HBM capacity trajectory (H100 80GB, B200 SXM 180GB, B300 SXM 288GB, Rubin 288GB HBM4, Rubin Ultra announced at 1TB)
H100 80GB → Rubin Ultra 1TBobservedcontested
| 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 | Use 180GB for the current NVIDIA HGX B200 SXM product specification; an unqualified 192GB figure does not match NVIDIA's current usable-memory product table. |
| Caveat | Announced figure (GTC 2025 roadmap: 1 TB HBM4e, four-die package) is no longer the supply chain's working assumption: TrendForce (2026-08-04) reports NVIDIA has been evaluating 8-Hi HBM4e, 12-Hi HBM4, and 8-Hi HBM4 alternatives to the 12-Hi HBM4e baseline since early 3Q26, final spec unset; sell-side notes put the working SKU at 192–256 GB with the four-die package possibly deferred. NVIDIA has not issued a spec revision — treat as roadmap-in-flux, not a replacement spec. |
| As of | 2026-08 |
| Source | NVIDIA · Table 1: HGX H200, B200 and B300 GPU and per Node & Memory specifications |
| Review | checking…review by 2026-09-24 · standard cadence |
| Recorded changes | last 2026-08-19 · 4 revisions tracked |
| Claim id | per-gpu-hbm-capacity-trajectory-b200-192gb-b300 |
Where the guide uses it
Not quoted in a chapter yet; it is kept in the curated register.
← Full numbers register — every date-stamped figure in the guide, with revision history.