Please note each users system specs will vary and results themselves will vary as well. All results will differ based upon your video card installed, CPU, game detail settings, driver versions and resolution. FSAA removes / smoothes jagged edges. On resolutions lower than 1280 or 1600 jagged edges can play a significant part. Again, as mentioned above, FSAA 2x or 4x may be a performance hit to your PC depending on your system limitations. If you feel your framerates may be running low or the game is running sluggish, you may want to turn FSAA off.