As the title says but this goes to ALL games at 1920x1080. In league of legends, highest and lowest, I will drop in team fights to 30 fps and some stutters. Overwatch is the same on all settings 30-60 FPS. Fallout 4 will drop to 15-20 fps in cities, every setting. Black Desert Online, lower fps on lower settings than a friend with an old comp, 40 fps difference sometimes. 20-30 FPS in cities. Not sure which GPU he uses, but it's AMD and not one of the 7970s from back then. All the latest drivers, reinstalled Windows, tried 7 and 10, no difference. I have seen builds very similar to this and didn't see these issues/fps reported. I have no idea what to do at this point. The only reply I seem to get for this is "turn off godrays" on FO4, but this makes no difference and doesn't explain all the other games.
I have RMAed the Motherboard and CPU, neither are the issue. I figured it couldn't be the GPU, but went through 2 970s before this and had similar issues. Compared the FPS to another comp with a MSI R7970 Lightning and the difference in fps was much better.
ATI R9 390
ASRock H97m Pro4
Corsair Vengeance 8 GB DDR3 1600
EVGA Supernova 650 G2 PSU