Did you buy the game through steam or in disc format? Was it from a trusted retailer? Given everything your going through it sounds like you got a busted game disc (ie isn't legit or maybe the game files are corrupted.) Just process of elimination, if your rig is good, your OS good, your hardware good, your drivers good, memory is good and your graphics good.... then its your software mate.
Thanks for providing all this information, did you make sure to try verifying the game cache before launching the game? Is this happening in both multiplayer and single player? Try turning off the Dynamic Fur and PhysX turbulence options in the Advanced Video settings. Also, you can set your graphics settings in the Nvidia Control Panel to run on the application settings or set them to the lowest values and slowly inch them up until you get a good mix of performance and quality. Let us know if that works for you!
When you mention turning off PhysX turbulence, do you mean through the NVidia control panel as I do not see an option for "turbulence" in the advanced video options. Also if you are referring to the control panel for NVidia, should I have PhysX run off the GPU or the CPU or both (current setting)?