Computer wont boot from anything.

I don't know what happened, computer was running fine. I was running a program over night for Stanford university that runs your computer at 100% for research to cure protein related diseases and I woke up to "Missing bootmgr" because it was trying to boot from a different HDD than it normally does. And when I switch it to boot from my C: drive it freezes at the windows logo screen where the 4 balls of light assemble to make the windows logo. But I can still boot it in safe mode which is the weird part.

I tried booting the windows installation off a bootable usb that has worked on other computers. but no matter what I do it freezes is the same place at that windows logo. I tried a Ubuntu CD also and that even crashes.

Also sometimes my computer goes into a state where it turns on for 2 sec then turns off in a non stop repeating cycle.

I've tried swapping the graphics cards and ram.
I've tried it with UEFI enabled with legacy and safeboot disabled and visa vera.

Computer specs.

I7 4790k
x2 radeon R9 290X's
Z97X Mobo
SanDisc Solid State.
16 Gb Ram