Not enough juice?

[ewitte]

I'm was playing around with Prime95. After a few minutes I get an error. I figure my problem is because of my old memory not taking the overclock well. So I fire up a few games. Yesterday I ran 3dmark and it ran fine at 2.92Ghz. These 2 games quit back to the desktop almost immediately. I even went back to stock 2.6Ghz AND upped the voltage from 1.525 to 1.55. No success. Yesterday I remember trying 240FSB it rebooted while loading windows. No errors... it just rebooted. My temperature is ok and my rails look about like they did on the last system. A little low, but I've always read a little low. I'm guessing my old 350W PSU is just not cutting it anymore. Does anyone else know another reason? BTW the last PSU calculator I did said I needed 396W minimum after listing the stuff I have in my system (see my sig). Also this is an older Antec with only a 15a 12 volt rail. Also I'm still running my PC3000 Hyper-X / Corsair PC3200 mix at 333. The PC3500 mushkin is not in yet.

Eric