NVIDIA Rubin enables 45°C liquid-cooled AI data centers

NVIDIA announced the Rubin generation of AI infrastructure, the world’s first servers to achieve 100% closed-loop liquid cooling and to operate coolant up to 45°C, enabling substantial energy and water savings (blog published Jun 21, 2026).

• Main announcement: NVIDIA’s Rubin platform and the NVIDIA DSX AI factory reference design describe a 100% liquid-cooled server architecture running coolant up to 45°C, eliminating server fans and enabling chiller-less operation in favorable climates; the blog states the design can reduce facility cooling water use to near zero and cites a potential savings of over $4 million annually for a 50-megawatt hyperscale facility that adopts liquid cooling.
• Background and supporting details: The article notes Motivair (Schneider Electric) as an ecosystem partner, cites industry context that cooling can account for up to 40% of data center electricity use and that raising chiller plant temperatures by 1°C can cut cooling energy costs by ~4%; it quantifies conventional water use as ~2.6 million gallons per megawatt per year for cooling-tower systems and describes closed-loop dry-cooler designs requiring chillers only ~1% of the year in some climates.