Here are my settings:
Dual Core 1.8 ghz
NVIDIA GeForce 8600 GT 512 MB
2 GB of RAM
Monitor: 15''

Have you noticed that my pc is very bad. So, my configuration has changed so it will run well on PC's bad.

Within the game, my fov is 65
I used to play with 80, but 65 better Standing with the use of assault.

I use a command r_texfiltermipmode 3
There are shows on the screen pixels. For me, it improved my gameplay.

There are also maps of my filmtweaks Promod. 
Put the files in the folder filmtweak main that will run the config, the buttons f7, f8, f9 ...

I hope you like it. : D