reinstall graphics drivers if you haven't already.
It almost looks like your GPU is being bottlenecked by your CPU, but that really shouldn't be the case given how strong of a CPU the 6700 is.
It is very weird indeed, a week ago I had none of these issues, such as weird recourse usage and if I use high polling rate it will cause extreme lag when moving mouse. I have tried re installing drivers but I am not sure if I have done it right. What I did was use DDU to uninstall the drivers, but I did not use it in safe mode, not sure if it makes a noticeable difference. After that I downloaded lastest AMD drivers and installed it, still having these issues, I even went ahead and installed the latest optional drivers after that, but no difference.
I did the "Userbenchmark" test and got these results:
https://www.userbenchmark.com/UserRun/18892243
As you can see the GPU is underperforming at 64% while the CPU is at 79%
I really dont know what is the cause of the issue is, but its driving me crazy! =[