PC power issue, erratic code

Heckwheels

Honorable
Sep 20, 2013
19
0
10,510
Hi there!

I recently started building my PC from my cm storm stryker into my new s340 so I could move it easier. I have the i7-4770k no overclock, 2 x corsair vengeance 8gb, gtx 770, corsair RM 750, Asus maximus vi hero.
For some reason, my PC won't stay constant. Sometimes the lights will power on but it refuses to start. Sometimes it does start, and works perfectly. 50% of the time it starts but gives me a 99 error and the boot device led is on. When I start it I try flipping the power switch and it gives me those results mentioned before. I have windows 8.1 and my PC worked perfectly before. Usually when it does start and works, I try to use it and it blue screens with a random error. The error always changes.

Thanks for any help you can give!