I have a 7970 OC with an AMD 8350. The processor shoudlnt be the issue right? And then power supply is 750w so that shouldnt be a problem? When running MSI Kombiburner it says im getting 100% gpu usage. When playing games like the wichter 2 or BF3 im peeking at 60-70% usage. Is there a fix for this?
If it is limited at 60fps then that is just because it doesn't need any more power.
If I where to turn VYSCN off would I therefor see an overall perfomrance increase?
Yes and no. VSync limits the framerate that is being output to the refresh rate of your monitor. For most monitors, that is 60hz. You generally won't see a visual increase in performance by disabling VSync because the monitor can still only display 60 frames per second (or whatever the refresh rate of your monitor is). You may/will however get screen tearing, but will decrease mouse lag (delay between when the mouse is moved and the onscreen cursor/camera moves). The degree to which you will notice either of these can vary. Personally, I am very sensitive to screen tearing, but not very sensitive to mouse lag.
In addition, be aware that some games do not like going over 60 fps. Bethesda games are a bit notorious for exploding objects and other physics based oddities. In this case, you need to limit the framerate either using VSync (or half VSync if you have a 120hz monitor) or using an fps limiter.