Just got a GTX 760 and I'm getting low 3D mark scores

My gpu is not maxing out at all. Could it be bottlenecking on my cpu? Which pcie slot is optimal? There are only two on this motherboard and I have the 760 in the same slot as my old card.
 
So while running borderlands 2 in windowed mode on the lowest settings possible I was getting an avg of 20fps from Msi and my resource moniter is showing my CPU 0-3 running in the 90-100% range. Does this mean that my cpu is bottlenecking me? Its an I5 760 that runs at 2.8. I feel like over-clocking could be a solution.
 
Try reinstalling your drivers or updating to the newest ones, that might fix the problem , i had problems in web sites freezing and making me have to hard reboot my cpu , i updated the driver on my old GTX 460SE and so far it fixed the problem , maybe updating yours will fix your physx score