I'm running a 2600k OC to 4.43 with SSD, 16 gb of 1866 RAM, with a reference EVGA 680 and I also have hits in towns. Running 30-45 in towns, but once I leave a huge jump. If I were to turn off the V-sync, world fps are 120-140 fps. In town it is around 30-45. Doesn't exactly sound right. Have had V-sync turned on the whole time, but I will have to try turning it off to see what it does.

@Jamielee

What hardware are you running?