The supercomputer is being cooled with hot water
the supercomputer is being cooled with hot water: nvidia’s rubin platform runs coolant at 45 degrees celsius with zero fans, warm enough to skip mechanical chillers, and the announcement alone knocked hvac stocks. liquid cooling jumped from 3 percent of deployments in 2021 to 37 percent this year.
the chip got so hot that heat became the engineering problem.
Context
Data Center Dynamics reported on Jan 7, 2026 that NVIDIA's Vera Rubin promises cooling with water at 45 degrees C with no chillers necessary, and that the reveal triggered a drop in HVAC shares (Facilities Dive, Jan 9: Jensen Huang at CES).
AKCP (Jul 10, 2026) says liquid cooling has climbed toward 37 percent of deployments in 2026, up from roughly 3 percent in 2021.
The 45 degrees C coolant, no chillers, the HVAC share drop and the liquid cooling share rise from 3 to about 37 percent match their sources. 'Zero fans' is not seen in the sources read, so unsupported here, not refuted. The 37 percent is from one trade source.
Related work
Watch next
- Look for NVIDIA's own statement on fan use in Rubin racks.
Sources
- DCD, Jan 7, 2026datacenterdynamics.com
- NVIDIA blog, Jun 22, 2026blogs.nvidia.com
- Facilities Dive, Jan 9, 2026facilitiesdive.com
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 2 October 2026 at 03:17 IST. Sources are the papers and datasets the note draws on.
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