this post was submitted on 26 Jun 2026
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What's the power scale of yours?
I suspect the big ones use evaporative cooling because they're trying to build in the gigawatt scale and IIRC there was talk about single racks reaching a megawatt soon, currently they're ~150 kW.
The power density of those new nVIdia GPU compute servers is nuts and using evaporative cooling means less energy use than closed loop.
What I'm saying is, some of those planned datacenters wouldn't be feasible with closed-loop water cooling. And yes, I agree with you that this should be legislated. If they can't cool their servers without evaporating a bunch of drinking water, they can... have fewer servers.
We are rated 16MW. Small within my company. Half of that capacity consists of Blackwell racks at 135KW per rack. We use closed-loop at all our sites no matter the size. And we have some BIG ones under construction.