This is only started happening, recently. Last year, I bought a seasonic 800w gold psu so I don't think that's the issue. It just happens during really intensive games like the paradox games on speed 5.
Pics with AIDA64 Extreme Stability Test after 10 minutes:
https://imgur.com/a/lv12X
Pics with AIDA64 Extreme Stability Test after 10 minutes:
https://imgur.com/a/lv12X