Well one of the dell poweredge 4200 servers died and was ripped appart. I managed to get one of the power supplies. Each one is 700watts..... Im pretty sure I can run a small athlon setup and a peltier off of that =) Im gonna get a heater core off of ebay same with an ehiem pump, I'll get all the tubing from lowes or hd, and I have tons of fans... But what about a water block? I have no idea what block is good now. It has to have 1/2" fittings and channels though.. The heatcores I can get have only 3/4" or 1/2". Any suggestions? Oh yeah I dont wanna spend more thank 50$ on a block. Thanks