[SOLVED] A friend's pc keeps crashing and has issues

[ezπz]

He can use his pc for some time when suddenly he it either freezes or he has some graphical bugs and crashes and bluescreens. Those often happen when booting into windows or closing windows. After clean driver installation it seemed to be OK only to reboot into a wierd buggy blackscreen

Spec:
i7 4790k
16gb ram
Evga Gtx 680
A crucial ssd
Bequiet PSU

 

[scout_03]

test gpu in another system and when it boot what driver gpu use generic or nvidia .