Motoamd, If its any consolation im using a 300W Antec and running a 1.7P4, 512MB RDRAM, CD/RW,DVD, 2 Seagate Barracuda IV's, 1 Seagate Cheetah X-15, Geforce 4 Ti4600, and Adaptec 19160 and have yet to have a hiccup with it, nor has the PSU gotten hot enough to even spin the fan full speed.