car lag

hello!

Every car lags when I get in it and switch to 3rd person view.
IT like the camera is not keeping up with the car…
This wasn’t a problem before but now it happens with every car.
And I did not install any mods recently. I have mods, but a day before it was ok.

OS: win 7
PROC: AMD phenom2 x4 3.0ghz
GRAPHIC: ati 5770 1gb
RAM: 4GB