Question XB270hu Flickering grey horizontal lines 2-3 times and then shuts off

[majordaniel112]

i7 6700k
msi motherboard
msi gtx 1070
xb270hu monitor
500 watt psu

Problem started maybe 2 weeks ago, sometimes it doesnt happen at all. I suspected the cpu overheating so i reapplied thermal paste. CPU temps a bit high but still ok. Maybe it is a failing psu? Gsync is disabled. Monitor cant be restarted after problem occurs, it just boots but nothing happens, have to restart the system. Any ideas?

 

[majordaniel112]

I feel like it happens less when the gpu is not overclocked.