I just recently built my first pc, and I'm having a strange problem when trying to restart. If I have my pc on for any length of time (2 minutes or more), and I attempt to restart, the pc will only boot up for a split second, before powering back down and attempting to restart itself again, over and over (doesn't even reach post). The same thing happens if I shut down completely and try to power back up. However if I let the machine sit for 5 or so minutes and try to power back up, it has no problems. Nor does it seem to have any problems when I just leave it on all day. Also, my mobo model (evga 655-kr) has a dual boot which can get a little annoying but I think its supposed to be some sort of safety mechanism. No idea if its related to this problem, as it powers up and down much faster when it's acting up. My psu is a corsair 750tx, almost brand new. I'm really hoping its the power supply and not a motherboard problem, any help would be appreciated.