Whoa! That's not good. With that setup, you should be able to max that game out with smooth frame rates. You should be getting 60 fps no problem. Do you have all the latest drivers for your GPU?
Thanks for the reply and yep, I have the latest release drivers.
I noticed that turning off MSAA but leaving everything else on ultra improved my fps massively, back to 55-60 - Seems like a very intensive setting if used?