NVIDIA's 45°C liquid cooling cuts data center water use to zero
Original: 45°C cooling design cuts data center water use to near zero
Why This Matters
Addresses critical data center efficiency and water scarcity challenges at hyperscale, with direct impact on operational costs and environmental sustainability.
NVIDIA's Rubin generation AI servers use 45-degree Celsius liquid cooling with no fans, enabling near-zero water consumption and reducing cooling costs by up to $4 million annually for 50-megawatt facilities versus conventional systems.
NVIDIA introduced a new cooling methodology in its Rubin generation AI infrastructure that achieves 100% liquid cooling across all chips and networking components in closed-loop systems without fans. The approach allows coolant temperatures to reach 45 degrees Celsius (113 degrees Fahrenheit), warmer than typical hot tubs at 38-40 degrees. This higher temperature enables greater energy efficiency because heat is captured directly at chips and transported through liquid loops, eliminating dependence on large volumes of cooled air. According to Ali Heydari, director of data center cooling and infrastructure at NVIDIA, the NVIDIA DSX AI factory reference design achieves zero water consumption through dry-cooler-based closed-loop systems with no evaporative cooling except potentially 1% of the year in certain climates. Historically, cooling accounts for up to 40% of data center electricity consumption. Industry estimates show that raising chiller plant temperatures by one degree cuts cooling energy costs by approximately 4%. A 50-megawatt hyperscale facility can save over $4 million annually in cooling-related energy and water costs by adopting liquid-cooled infrastructure. Traditional air-cooled data centers require significant water consumption—approximately 2.6 million gallons per megawatt annually—but NVIDIA's design reduces this to near zero by using dry coolers to reject heat efficiently without consuming new water in closed loops. The Rubin platform's universal adoption of liquid cooling is driving industry-wide ecosystem transition.