its the fx's fault it likes fast cache on the intels but the fx is really really slow which impacts this game more than any other... due to it being badly ported.
the fx 4100 has very poor single threaded performance and when you use all 4 threads the impact just mounts, purely because of the cache issue which i alluded to earlier.
all you can really do is increase the gpu load and hope its enough to smooth out the gameplay... chances are it wont though...
but i dont understand 1 thing which is that why was the game running smoothly on the win7 ultimate 32 bit on the same pc 2 weeks ago ?
i m running f1 2011, alan wake, mass effect 3, fifa 12,fear 3 and some ps2 emulation games smoothly........ on the 64bit