I ' ve had this problem the entire time I ' ve owned ETS 2 . I play in triples and I always get a 1015 fps loss when I drive into a city , otherwise i ' m at a smooth 60 fps . I downloaded the ATS demo to see if it was giving me the same issues and , it does . From what I ' ve read in the SCS forums , its because of the game engine , and the main culprit is the incockpit mirrors . When I ' m in a city , and my fps is around 40 , I can switch to bumper cam mode and it jumps right back up to smooth 60 fps . I have experimented with turning the lower mirrors off , but this amakes it hard to back your load in and bdoesn ' t really help much . Unfortunately it doesn ' t appear there will be any solution until SCS make a new sim using a new engine . I am really experimenting a lot with my setup , if I find anything helpful I will post back here .