You guys are waaay overkill, my 420watt thermaltake lets me run 2 hard drives, an AMD 3400+ OC'ed to 2.66GHZ, 2x 512 meg ram, 13 fans, an A8V and a 6600GT
I have that psu given in the link above. Its a great psu. I have five hard drive and many other pieces or hardware inmy pc. Antec makes great psu that last and that are very quiet.
Well i have a budget for my other computer to 60$ thast why i was saying like 18v cause i cant afford much for my smaller computer righ tnow. i was thinkin the 380watt true power