ok, this is hard, but, this picture should explain it (maybe) paint ftw
when you pass cp on fps limit
ON it counts time when fsp ends, if it is 25 fps per second so all frap have 0.04 sec
when you pass cp on fps limit
OFF it counts time when fsp ends, if it is 60 fps per second so all frap have 0.01(6) sec
so it is 0.02(3)4 second diffrence (if i understand it good, if it is worng fuck it)
btw is server off ?