You can get interesting things happening in games by modifying the CF and then using the speed limiter to influence it.
Like Goldeneye - CF3 is good but slightly jerky, CF1 is perfect but uses more system resources, CF2 uses about the same as CF3 but is too fast. So in that case if you don't care about the sound you could just use CF2 and decrease the speed by 10%.... hehe, not really advocating things like that as a proper solution to a problem, but it's a nice option to have.