Nvidia Unveils Liquid-Cooled Data Center Design to Reduce Water Usage

Nvidia Unveils Liquid-Cooled Data Center Design to Reduce Water Usage Nvidia’s latest data center design is being hailed as a breakthrough in cutting AI’s thirst for water, even as critics argue it solves only the part of the problem that sits inside the building.

On June 22, during London Climate Week, Nvidia unveiled a new warm-liquid cooling architecture for its next-generation Rubin servers, saying its AI infrastructure can now be “fully cooled with liquid warm enough to reduce the need for additional chilling equipment.” The system uses a recirculated coolant mix similar to automotive antifreeze that can run at 113°F, sharply reducing reliance on water-intensive cooling towers.

Nvidia’s chief sustainability officer Josh Parker framed the step as transformative, telling Axios that “the water consumption challenge for data centers is largely solved.” Microsoft data center engineering vice president Steve Solomon, briefed on the concept in general terms, said such designs could eliminate mechanical chillers in most climates, even hot regions like Arizona.

Later the same day, The Verge reported Nvidia’s claim that its fully liquid-cooled Rubin reference design has “eliminated massive amounts of power usage and pretty much all water usage,” cutting consumption “from roughly 2.6 million gallons per megawatt per year for conventional cooling-tower-based systems to near zero — up to a 100 percent reduction.”

Tech investors and AI leaders quickly amplified the message. Elon Musk responded “True” to Nvidia’s promotion of data showing data centers use just 0.2% of daily U.S. water. Perplexity AI CEO Aravind Srinivas argued that “the marginal water consumption of a properly implemented data center for its liquid cooling is almost zero,” saying people confuse water for cooling with water used by power plants supplying electricity.

But a parallel analysis from TechCrunch the same day warned that Nvidia is “drawing a line around the data center.” While the closed-loop coolant can indeed eliminate “pretty much all water usage inside the data center,” the article notes that water consumed in electricity generation and chip manufacturing can double or triple a facility’s total water footprint, meaning Nvidia’s design may address only “about a quarter to a third” of AI data centers’ overall water use.

As AI demand surges, the emerging consensus is that warm-liquid cooling could dramatically shrink on-site water use — but the broader water impact will depend on how quickly the grid that powers those centers shifts away from thirsty fossil-fuel generation.

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