FPS is the frames per second that you see on your PC, the greater the SPF number the better the quality of the game, but it will run clean. To see your FPS in CS, just type in your console: net_graph 3
1. Always keep your computer clean, do not keep useless stuff installed on it, it weighs too much for you to play better.
2. Let only the essentials, decrease boot files from your PC.
Go to: Start> Run and type msconfig.
Open the tab "Startup" and uncheck everything that is not useful, rather just let the anti-virus enabled. This will allow you to boot your computer much faster.
3. Choose the best resolution for your computer.
I recommend the 1024x768 resolution, a reasonable machine can use it in OpenGL mode no problems. But when the resolution is lower, the higher the SPF. Use the software so if you do not have a video card.
4. Useful commands:
cl_bob "0" - This command serves to target getting thinner;
cl_bobup "0" - The target will rise less than normal;
cl_bobcycle "0" - Enables / disables the motion of the gun when you run;
cl_himodels "0" - Let the value to 0;
fps_max "99" - sets the maximum FPS.
See the image showing the difference in graphic:aumentando_fps_counter_strike_16.jpg