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Thermoelectric coolers are not even able to keep up with modern CPUs. Or rather, they can, but they are very energy hungry. As much or more so than the CPU itself.

Mostly: thermometric coolers are bad for >50K difference and >10W heat flux on the cold side. Most uses are better off with a sterling cooler or maybe even an absorption refrigerator, which can have no mechanical parts (just fluids, plumbing and heat exchanges) and could theoretically provide human-centric AC/refrigeration based on server waste heat.

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