Actually yes, when it started doing this i've taken it to a "technician", he changed the cpu heatsink(i was using the default one), it helped since before that i couldn't use the computer even without games running.
I'm also thinking that the problem is overheat but i don't know what to change anymore, just switched cases but it didn't solve the problem

Btw, just got this error in BSOD "Bad Pool Header"