I probably stutter about once or twice a minute, I have over 60 mods installed which I think maybe the case, but I dont know which ones to deactivate to see.

Im using 580 SLI, 980x and 6GB DDR3 Cors Dom Ram, and they are all frosty cool.

Any ideas what maybe causing it? Thanks guys.

Hmm, I seem to have fixed it - at least reduced it dramatically - by disabling lush tress. Perhaps a conflict with another mod, as my system should be able to take anything the creation engine throws at it.