I've reached the limits of my incompetence, so I'm not sure I can contribute much more. The FX 8350 seems to be an "interesting" CPU in much of what I read about it, so there may be something about...

Do the game makers specify minimum or recommended PC configurations? If so, how does your rig compare? It might just be lagging because it's not up to the task. No sense trying to fix something...

This is also a possibility, especially given that your friend's rig has a newer graphics card and 4X RAM when compared to yours. Have you tried other VR games to see if you get the same symptoms from...

Looks like you did it right, and also looks like the load fails to violate Eksy61's formula (sustained 10X core count). When you run the performance tab in Task Manager, do you see anything maxing...