Hi guys,

So I have an issue on my hands here. I just bought a 7700k and msi z270 gaming m5 motherboard. For the first two weeks, everything worked flawlessly. Used XMP to OC my ram to 3000hz and overclocked my cpu to 4.8 at 1.25 volts without any issues. NOW, all of a sudden things aren't as blissful and it all started as soon as I plugged in my second monitor(although I'm very skeptical that that could be the problem). NOW, I crash from games every time and blue screen from time to time whenever I try to play anything. I've upped the voltage on my cpu to 1.30 and 1.31 and I still crash. 4.8 at those voltages pass an OCCT test for 10 hours. I just turned off XMP to see if that would do anything so that my ram speed was at the defaulted 2133 and I still crashed. 

4.8 on my cpu was very stable at 1.25 for two weeks and then it wasn't...it was also stable at 1.275 for a few weeks once I crashed a few times at 1.25. NOW, it crashes all the time at 1.31. Is this still not enough voltage even though it passes an OCCT test for 10 hours? What could be the problem here? Faulty CPU/mobo/ram? Just for giggles, I ran my cpu at 4.2(default speed) with an auto voltage and I was actually able to play through an entire game. 
 
I just upped my voltage to 1.35 and i blue screened immediately upon entering a game. Can a CPU degrade within a matter of weeks?? Is it just faulty? I've even blue screened just watching twitch.tv and uninstaller graphics drivers in SAFE Mode.

Components:
7700k
EVGA Gtx 1080
MSI z270 gaming m5
EVGA 750w P2 psu

Where should I go from here?