@Orb2069 @momo Slightly more read self-correction: Looks like you're right for most already installed capacity with older gen chips, they run air cooled chips with evaporative cleaning to keep the buildings themselves cool, thanks!

newer gen installs with newer chips are switching towards closed water loops though (the GBs I mentioned earlier) and the facilties water loop seem to only "very rarely" (.. I guess where the climate is too hot) need evaporative cooling there.

@Orb2069 @momo Quick self correction: I was mixing up evaporative (ie. cooling towers) and immersion cooling, doing a bit more reading up!

@Orb2069 @momo Great, a lovely article with no reference to what hardware its talking about except "AI data centers" as a label, truly authorative.
No .. Virtually all AI focussed chips, at least the ones NVIDIA makes, are either air cooled or in closed water loops.
You can look up their spec sheets, they're public.

@momo Except none of it us true ... evaporative cooling is almost entirely unused in the AI industry because it doesn't work.

Every NVIDIA chip (which is like, almost the entire industry at this point) uses either air cooling with giant fan walls, or closed loop water cooling with heat exchangers (For GB200-GB300s)

Not arguing the business model of large AI labs though ...