I have a Inwin full tower, I've had it for ages, and it only has a 235 watt ps. It's running a Cell566 running 850 now. I'm upgradeing to a Duron 650, which I will o'c. Is the ps enough? Other specs are 256megs ram, Voodoo3, pci sound card, dvd drive, cdrw, 2 case fans,and a 7200rpm Maxtor 30 gig.