Radeon 7990 Custom super cooler

Liquid nitrogen would be more feasible...no joke really
Regular water should be enough for such card.

don't get frustrated... peltiers are a type of cooling i didn't really look into till I started frequenting this forum.

But the math behind them is unavoidable. They're excellent if you have a system to remove the heat energy efficiently. otherwise,they're sorta junk. A huge custom waterloop could manage it. I was reading recently about someones cool geothermic watercooling loop. freakin' awesome as far as I could tell. Something like that, if you buried enough copper pipe in the ground could probably easily dissipate the heat from a number of peltiers. Of course, something like that would already be cooling your loop pretty effectively... to far bellow ambient, and you wouldn't need a peltier anyway.

The math just doesn't work well with them, and they introduce all sorts of complications.

Still, they shine on older hardware, where you can get away with a decent air cooler or cheap aio to cool the hot side lol