I am having the problem with stuttering as well. I see it only in turns so I suppose it is related to Accuforce wheel that I use. I am using tripples 3x1440p and have around 70-80 fps. I use RTX 2080 ti and i7 8700 so the power shall be sufficcient. Dyn HUD is off, I tried both vsync on and off, but still no luck. Any suggestions?