on-board capacitance shaping the sub-ms edge: ~65 J/GPU (GB300) to ~400 J/GPU (Vera Rubin) before the bus ever sees the pulse
~65–400 J/GPUobserved
| 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 | Composite range: the ~65 J/GPU lower bound is the shipping GB300 NVL72 power-shelf figure; the ~400 J/GPU upper bound is NVIDIA's stated design figure for the Vera Rubin PSU capacitor system (platform shipping since June 2026). Both are vendor design statements, not independent field measurements. |
| As of | 2026 |
| Source | NVIDIA / SemiAnalysis · GB300 power-supply discussion; NVIDIA specifies 65 joules per GPU of capacitor energy storage. |
| Review | checking…review by 2026-09-06 · standard cadence |
| Recorded changes | last 2026-06-29 |
| Claim id | on-board-capacitance-shaping-the-sub-ms-edge-65 |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.