GB200 NVL72 coolant flow in vendor reference designs at roughly 12 °C rise
~130–140 L/min (vendor references at roughly 12 °C rise)observed
| 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 | Vendor-reference rack flows: QCT gives up to 130 L/min for the GB200 NVL72 rack (115 kW liquid, 17 kW air) and nVent about 138 L/min per rack (its CDU800 sizing of 690 L/min of PG25 across five racks at 575 kW), both near a 12 °C rise. QCT's 110 L/min figure is its QoolRack sidecar's rating at 75 kW, not a rack requirement. The guide's separate water-property derivation spans OCP's 7.5–12 °C rise across ~115 kW: ~140–220 L/min of water (~144–230 L/min PG25 at OCP's 1.25–2.0 L/min per kW); its 12 °C end, ~138 L/min, lands on these vendor points. |
| Caveat | QCT up to 130 L/min and nVent ~138 L/min are vendor-reference operating points near a 12 °C rise, the warm end of OCP's 7.5–12 °C range; the guide's ~140–220 L/min water band spans the whole range. |
| As of | 2025 |
| Source | QCT QoolRack Stand-alone for GB200 NVL72 (up to 130 L/min per rack); nVent RackChiller CDU800 spec sheet, nVent-SPEC-01468 rev 2502 (690 L/min PG25 for five GB200 NVL72 racks, about 138 L/min per rack) · QCT QoolRack PDF p.3: rack flow 'goes up to 130 liters per minute (LPM) per rack'; QoolRack removes 75 kW at 110 LPM; system coolant flow 130 LPM, liquid 115 kW. nVent CDU800 spec sheet p.2, GB200-NVL72 Support: 5 racks, 575 kW, secondary [TCS] PG25 flow 690 LPM (138 L/min per rack) |
| Review | checking…review by 2027-06-22 · slow cadence |
| Recorded changes | last 2026-10-19 · 5 revisions tracked |
| Claim id | gb200-nvl72-coolant-acceptance-envelope-and |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.