lagging althoug i have 250fps+

thanks for your answer, maybe I should have described it better.
It ain't lags it is more like it feels totally unsmooth and uncomfortable.
I haven't had the problem like 6 months ago when I played the last time.
And only when I play on my new monitor it is like that
e: lol. found a fix. just have to run crossfire on duplicated screen so it runs on the laptop screen and the external monitor