Alright so, closing logitech setpoint did the trick. It clearly messes with the clock speed. BUT, it seems that opening other apps lowers the clock too, such as a simple download manager. Do most programs use hardware acceleration?
http://prntscr.com/d8ooas
Edit: I guess <70% power is still kind of low?
 
Pc specs
i7 6700k
Asus VIII hero alpha
Gskill 2x8gb ddr4 3600
pc power and cooling 650w (ripple on 12v out of spec, needs to be warrantied. At least 5yr old. Edit: Tried Aida64 and it shows 12.08v and 12.196v load and no load. I guess it is okay after all)
picture because I'm proud of it: http://prntscr.com/d8okz7
 
And after looking at the picture, I now see that the replacement 1080 has a sharp downward bend at the sli connectors on the board. How does that even happen.
http://prntscr.com/d8onku
...something something should have bought evga like every other card I have ever owned :(

I dumped "Logitech SetPoint Software" years ago because all kinds of issues.
Glad to see you are now up and running solid now.

Come to think of it now "Logitech SetPoint Software" caused all kinds of Excel issues at my last work place.

Good to go! Thanks again for the help