A few months ago my computer started randomly powering off, sometimes I would get a few hours, sometimes a few days. I first replaced the power supply (PC Power and Cooling Silencer Mk II) which stopped the issue for a few weeks, but then it came back.
The other day I got a new motherboard (Asus sabertooth x79), CPU (i7 3930k), and got a new graphics card (GTX650) and it still does it, except now I can't even get a few minutes. I tried replacing the power supply again (Corsair CX750) and no luck. I've tried taking out some of the ram and all the ram. Unplugged all the hard drives and still can't get more than a few minutes at best.
When it does power on, I can get into the bios and make changes, I've even gotten to the windows loading screen if it stays on long enough. I do not have a cpu fan/heatsink at the moment, but I don't think that should prevent the system from staying powered on for more than 30 seconds.
Ive also tried different outlets, cables, and even using the power switch from a different case (the old power supply seems to run in another build without issue).
Any help I can get with this would be greatly appreciated