Nvidia's Rubin-generation data center design eliminates water use by running servers at 45°C with full liquid cooling
Tags Infrastructure · AI
Nvidia announced that its Rubin-generation reference design for fully liquid-cooled data centers reduces water consumption from roughly 2.6 million gallons per megawatt per year to near zero — a claimed 100% reduction. The design runs AI servers at temperatures up to 45°C (113°F), capturing heat directly at the chip through liquid loops operating at high temperatures, enabling outdoor dry coolers to reject heat efficiently. Nvidia's head of sustainability Josh Parker said every cloud provider building for Rubin is making the transition. However, the design does not address the water consumed by fossil fuel power plants that generate electricity for data centers, which remains AI's largest water footprint.
Technical significance
Running servers at 45°C is a significant engineering shift that enables dry cooling, eliminating the evaporative cooling towers that consume most data center water. However, the power generation side — where fossil fuel plants use vast amounts of water for steam cycles — remains unaddressed. The industry-wide adoption of this design could meaningfully reduce direct data center water use, but total AI water consumption will still be dominated by how the electricity is generated.