Can you help me please? My sens is 30 and dpi 1800, my cursor and game are delay. I don't know what's that? Do you know some commands to the console for better accuracy. (Problems isn't in my HW mouse or in my aim)

whats your frame-rate like. Chances are its that you're getting low FPS rather than mouse delay.

My FPS is good 100+ on GTX480

I think, for fix it is some command...some ''mouse accel''...