Quote:
Originally Posted by Jimbo Mahoney
Peltier water-chilling has been done, but I believe it needed one water loop to cool the peltiers and one to circulate the chilled water to the CPU and gfx card. Not cheap and not efficient, but probably fun! 
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Exactly. If you want quiet and don't care about cold temps, use a passive rad, or 5V your fans, or just use a huge reservoir and no fans.
If you want cold temps, you need two water loops. I suppose it
could be done with air-cooled pelts, but i bet you would need at least 5 or 6, and then you have to have fans to cool the hot side of you pelts anyway, so you might as well just use a radiator (much more economic).