It removes the FPS cap that is enabled by default. +fps_max 0 is actually a console command that you can use as a launch option. tickrate 128 sets the tick rate of any "Offline With Bots" games, or any servers that you host via your client to 128 (as opposed to 64). tickrate 128 +fps_max 0 -novid -nojoy Copy The launch options that you should be running are: There are some launch options that will be useful for everyone, but the benefit they provide can be fairly small, so to be clear: they aren't a magic solution for bad aim! We told a white lie when we said that launch options aren't a "one size fits all" tool.
Unfortunately launch options aren't a silver bullet for most players, and as we said above, lots of guides will falsely claim that their selection of "best launch options" are.