Config file not working? Setting max fps.

Hi. I got a problem with my pc: it needs a limited amount of frames per second to work with. 300 fps make my pc crash with BSOD. In some other games i solved this by enabling vsync or setting a fps max. The problem is : config file modification did nothing for me and when i try to set max fps ingame it says: cant set fps_max when connected.

I dont want to play with vsync on: it has a negative effect on mouse movement and aim.

How do i set fps max?

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.