Yep I told it to force DX9 and all my problems disappeared ... the game also runs very very fast as well which I find kind of silly considering it still looks basically the same as it did on Very High settings. Oh well ... thanks for the help!
Yes so you had two problems
1) Motionblur f**ked you over like it did to me and my mate
2) Dx10 is alot harder to run for hardly any prettyness (Worth it imo) and so huge increase in FPS stops any sharp FPS drop getting too low.
On a side note, dx10 is more stable, but if you have no problems, stay with DX9!!!
Oh and glad it fixed the problem
