I just got my system together and it's doing some odd things. I got XP installed. It will boot cold fine, except the I have to push the power button twice. hmm... Once I reboot it will posts goes all the way to the end of post and then reboots. XP will not load. I checked temps for CPU in bios and it's around 35C. I'm not saying it's the PS yet, but I'm going to switch it out with my NeoPower 480 and see how it goes.