Big Tech NVIDIA data center hardware is being cooled with water 'hotter than a hot tub' It may seem counterintuitive, but 113-degree water is still cool enough to cool NVIDA's latest hardware. By Gabriela VΔtu July 20, 2026 9:30 am EST NVIDIA Here's a question you probably didn't expect to read today (or ever): what do AI supercomputers and hot tubs have in common? Sounds like the start of a joke, doesn't it? The truth, however, is that while a hot tub runs at around 38 to 40 degrees Celcius, NVIDIA'S newest AI servers push their "cooling" liquid even hotter , all the way up to 45 degree Celcius, or 113 degrees Fahrenheit. It may sound backwards, because how can running hot liquid cool down server rooms? The old approach had data centers pour tons of energy into chilling air, then pushing the cold air across every component, running loud fans and chillers just to keep chips comfortable.
Now, when coolant runs hot, outdoor dry coolers can shed heat on their own without requiring chillers. Once you understand how all of this works, you'll find the old way of cooling data centers pretty wasteful. More budget friendly, more climate-friendly NVIDIA's Rubin generation of AI infrastructure is fully liquid-cooled. No fans, no cold aisles, no walking into a freezer when you're in the server room.
Source: https://www.engadget.com/2214770/nvidia-data-center-liquid-cooling-temperature-heat/
Now, when coolant runs hot, outdoor dry coolers can shed heat on their own without requiring chillers. Once you understand how all of this works, you'll find the old way of cooling data centers pretty wasteful. More budget friendly, more climate-friendly NVIDIA's Rubin generation of AI infrastructure is fully liquid-cooled. No fans, no cold aisles, no walking into a freezer when you're in the server room.
Source: https://www.engadget.com/2214770/nvidia-data-center-liquid-cooling-temperature-heat/