I have a P4 3.4 GHz with 1GB ram, WinXP Home, ATI 9600 video card and a Audigy 2 ZS sound card. With a Sony CD drive, Sony DVD drive, Maxtor 120GB harddrive, a zip drive, floppy drive, a media card reader, 4 80mm fans and a processer fan. All this is run with a 450W power supply. I run this computer 24/7 while surfing, downloading, playing music, buring CD/DVDs and running apps I don't have any problems. I have a couple of games (NFSMW & World Series of Poker TOC). I play these for 5 or 10 minutes and then my computer just shuts off. I'll restart and it shuts off before it gets through the