Open the console by pressing ` (the key above tab (the key above caps lock)).
If this doesn't do anything, press Esc, go to Options then the keyboard tab. Select advanced from the bottom and tick the box that says something about the console.
Press OK and OK again.
Now press ' to bring up the console.
Type rate 25000 then press Enter.
Type cl_updaterate 66 then press Enter.
Type cl_cmdrate 66 then press Enter.
The cl_cmdrate and cl_updaterate can be anything between 66 and 100 for good performance, I personally use 81, I don't know why.
If you are already connected to a server, disconnect and reconnect for the new rates to take effect.
Option 2
Optionally you can edit the config file from Windows.
Go to
C:\Program Files\Valve\Steam\Steamapps\<username>\Counter-strike Source\cstrike\cfg\
or
C:\Program Files\Steam\Steamapps\<username>\Counter-strike Source\cstrike\cfg\
You can either open config.cfg and edit the rates that are in that file, or you can create a new text file called autoexec.cfg.
Open either file in notepad.
Add the following lines.
Code: Select all
rate 25000
cl_updaterate 66
cl_cmdrate 66