Display stops working and hashrate drops after a few hours

As the title says when I mine for a few hours I'll go from 20Mh/s to 3-4Mh/s, at the same time that happens my display goes black and wont turn on without rebooting. I'm on windows 10 with ryzen 5 3500x (no integrated gpu) and 2 rx 580 8GB, it doesnt matter which card I run my display from, still have this issue. I had been using teamredminer .0.8.0, but just updated to 0.8.1.1, I'll post back if this fixes it.