BSOD / Sudden reboot of system, mostly when gaming

Hi, I've been having sudden reboots for a few months now but lately it's become worse (can happen once every 30 minutes). Usually it happens when I am playing games but I can also force a BSOD by running Prime95.

I noticed that both the reboots and BSOD seem to happen much less when my CPU is not overclocked, but they're never truly gone. I cleaned the PC real good and the temps are very low (got a water cooling system).

I'm wondering if it's a driver issue or if the CPU is just defective. I ran with the same settings for 1 year and a half without trouble before this. I've tried disabling some drivers but nothing seems to help... I have a feeling a recent driver caused the issue but I can't seem to find the culprit.

I need help!

same problem here, when I play Diablo 3

Is there nobody to help me? I even attached the necessary files as asked.