I have now run both. Seems stable…
Not quite sure what I should look for in terms of CPU performance, but I’m thinking that if the system is stable, all I need to know is the frametime I get in VR 
Indeed there are! I’m not sure what the difference is, but enabling PBO in the AI Tweaker works just fine. Enabling it under Advanced, does not… Go figure.
Not sure how this should be set up correctly?