# NVIDIA data centers cooled with hot tub-temperature water 45°C liquid cooling revolutionizes energy and water consumption. - **Source:** [Engadget](https://www.engadget.com) - **Published:** 2026-07-20 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/477f4220-ef5a-4cdf-aaf7-8512ac439933 ## The hot water cooling paradox NVIDIA's new AI servers use coolant heated up to 45°C (113°F). Unlike traditional systems, this method reduces cooling energy needs by up to 40%. The hot liquid naturally dissipates heat outdoors without mechanical chillers. ## Energy efficiency breakthrough Rubin-generation AI infrastructure is fully liquid-cooled. Cooling previously accounted for 40% of data center electricity bills. Every 1°C increase in coolant temperature now cuts energy costs by 4%, saving $4M annually for 50MW facilities. ## Dramatic water savings Conventional systems consume ~2.6M gallons of water per MW annually. NVIDIA's closed-loop system reduces this to near zero, eliminating evaporative cooling towers and continuous water drainage. ## Stable chip performance Coolant entering at 45°C absorbs chip heat and exits at 55°C. Liquid-cooled plates maintain safe operating temperatures for full-performance operation. Geographic location matters, but mechanical chillers become unnecessary. ## Silent and compact design Rubin architecture eliminates noisy fans and cooling systems. Configurations that required six rack units now fit in two. Data centers no longer need hearing protection for workers. ## Sustainable data centers This technology addresses chronic issues like high energy/water consumption, noise pollution, and space requirements. While not retrofitting existing centers, it sets a new standard for future facilities. ## Sources covering this story - https://www.engadget.com/2214770/nvidia-data-center-liquid-cooling-temperature-heat/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._