3dmark scores for ye:
no aa no af: 13950
2x aa: 12800
2x aa 2x af (at performance, not quality): 12100
2x aa 4x af (performance, the best setting. Excellent quality, no jaggies, crisp and stunna) 11250
I dont use 4x, or 6x aa: the performance hit is greater, yet, almost no difference between 2x. 2x removes all the jaggies quite well.
I stopped at 4x af, because higher, the performance hit is visible (Especially in Postal2, or U2 otdoors), yet the quality is awesome.
at 4x aa, and 16x af - is only needed for operation flashpoint, for as the quality of picture would be UBELIEVABLY AWESOME. Sides that - i dont need it. Also, enter the matrix suffers (the framerate) once the setting goes above 4x aa, and 4x af: yet the quality is the same.
Just make sure, u enable "performance" anisotropic filtering as opposed to quality. Image q is visually the same, yet the fps (ESPECIALLY in postal2) are higher.