CSGO is one game that doesn't like FRTC the only way to limit CSGO FPS without getting stutter is by using the games own limiter FPS_MAX 143 in the console.
I think the reason for this is how CSGO works your FPS is linked with your network latency, this the reason you shouldn't limit your FPS. It can give you worst hit reg
OK that’s good to know, cheers.