There is no denying that Far Cry is currently one of the most graphic intensive games on the market, utilizing PS2.0 technology (the latest versions support Shader Model 3.0 with DX9c) and offering an exceptional visual experience there is no denying that even some of the faster graphics cards struggle.
With Far Cry being so CPU limited the optimization implemented for Dual Core processors can really be seen here. Even the little X550 sees a small FPS bump at the lower resolution though you can clearly see the increase given to the X700 and X850XT.