Lenovo's GB300 (W45) and NVIDIA's Rubin platform accept coolant up to ~45 °C, adding chiller-less hours without guaranteeing them year-round
~45 °Cobserved
| 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 | A product coolant-inlet limit is not an ASHRAE facility-water (FWS) setpoint. NVIDIA's blog names the Rubin platform but not Vera Rubin NVL72, and gives no rack-level inlet rating. |
| As of | 2026-06 |
| Source | NVIDIA blog 'Hotter Than a Hot Tub' (2026-06-21); Lenovo Press LP2357 (2026-08-30); ASHRAE TC 9.9 for the class definition only |
| Review | checking…review by 2027-04-14 · standard cadence |
| Recorded changes | last 2026-10-14 · 2 revisions tracked |
| Claim id | warm-water-inlet-band-w40-w45-gb200-and-rubin |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.