Pretty much everything. What resolution?
He probably has max settings, but no AA/AF or is running at lower resolution, or running at ~30 FPS
nope he is running 1080p, and how do u activate AA/AF ? and what exactly is it?
Activated through the game settings, Anti-Aliasing and Anisotropic Filtering.
The former will process frames more than ones to reduce jagged edges, providing smoother, more realistic images, the latter will make images that are further away when viewed at an angle look clearer
so turning it off will make it smoother and more frames per second?
Depends on how picky you want to be, if you dont mind 30fps, or 40 fps you should max out most, if you want full 60fps probably not a lot.