700W per cm^2... since it works like a pelt (heat pump) you *will* have to use watercooling (with a goooood rad !) on the hot side, or else you'll melt everything.
I see a few problems:
- even if the device is 1cm^2 (very roughly the size of a CPU core) -> it will need 700W of power. The prices of 700+W PSUs are, hhmmmmm, painful
- the 'cold' side may drop below the 130°K which is the point where semiconductors (aka transistors in CPUs) stop being 'semi' conductors, and start conducting fully. Which is, for a CPU, not good.
My guess is that we'll leave that technology together with helium phase change cooling... not adapted to our budgets / needs.
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