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this post was submitted on 31 Mar 2026
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Air and water move, especially when heated.
But un a radius of 6 mi? That sounds a bit high.
More close to a city with lots of concrete to store the heat.
Large data centers can consume over 100 MW of power. Almost ALL the energy a computer consumes is turned into heat, like well over 90%. A home AC unit pulls a little under 1 kW, and I think heating is about the same so that's equivalent to heating over 100,000 homes, except those homes will eventually get warm and stop running the heat. The data center churns all day, every day. Given that, it may be equivalent to all the heat put out in more like 250,000 homes. Data centers produce an ABSURD amount of heat.
Edit: and keep in mind, that's HOMES, not people. Average people per household in the US is 2.5, so that's heating for over 600,000 people.
Sorry to nitpick but doesn't 100% of it end up as heat? Vibrations, light, sounds, radio waves- all a tiny fraction of the power are also eventually absorbed by the environment.
That was my understanding at least
My understanding is that some tiny portion, like 1-2%, is actually used in a meaningful way to do calculations to do what you want, but that could incorrect. Or it may be that that tiny portion still inevitably turns to heat, just indirectly somehow. I'm not sure, though, you could be right.
All of the energy that does calculations gets turned into heat. The only energy that doesn't get directly turned into heat is the mechanical energy produced by the fans (which ends up turning into heat), and the electromagnetic radiation (which also ends up turning into heat).
If the calculations didn't convert energy into heat, a computer would essentially use no power. You can think of a computer like a really complex wire. The power consumption you see is actually the heat loss of that wire. The less heat you lose, the more efficient the wire is.
How did you go from 10% to 1-2%? Please don’t use such precise figures when the source is clearly your ass.
I said over 90% because I couldn't remember the correct figure. I wanted to be as accurate as I could be with full confidence. If you think something I said was inaccurate, feel free to correct me, but so far, it looks like I was right but could have been more precise if I'd wanted to spend even more time fact checking.
No, you are wrong. Energy is always preserved, computers turn everything that goes into them into heat.
I would think there'd be some very minor bleeds at a minimum. Like the fan churns the air, and that definitely turns a lot of its energy into heat, but someone of that energy is spent on actual movement, not simply heating air particles. But without more precise figures for that, "well over 90%", or whatever my exact wording was, is true and precise enough to make my point. I could have looked up a more precise figure, but it wouldn't have significantly impacted the very rough math that was only intended to approximate the truth well enough to illustrate the point.
Yeah but will that happen in the 6M radius that we are talking about?
No, it'll all happen inside the data center. The problem with that is computers hate all that heat, so they pipe it all away and dump it outside to the best of their ability. The data center may not be 6 miles wide, but then the wind starts blowing the heat around. Hell, even on a perfectly still day, heat would radiate out. They're making enough heat to keep every single home in a city of 500,000+ people comfortable in winter, so it's either that or the data center turns into the world's largest oven.