I have an Athlon XP 2100+, 2 case fans, floppy, 7200 rpm HDD, Thermaltake Volcano 9 HSF, DVD rom, CDRW, and CDRom all running off of a generic dual fan 400 watt PSU that was in a case I bought for $48 including shipping off of Ebay last summer. Granted, the psu is LOUD, but it's been utterly...