Just for reference:
My rig is a i7 960 3.2 ghz quad core with a 3.4ghz turbo boost,6 gigs of 1600 ddr3 ram, a gtx 460 1gb,windows 7 64 bit. My settings are at high, 4x aa,8xaf,medium shadows and a 1440x900 res. Normally I get a stable 60 fps but when im runnung towards a town the fps will drop noticably. Im almost ready to run out and buy another gtx 460 for sli to solve this, however im not sure adding another card will neccesarily help..

