I could never make that work, but I’m running old drivers; also, since I run more than one display normally, vsync in the control panel causes odd things to happen around frame rates for me. But I don’t use FG anyway, despite having a 4090. I’m less worried about pure FPS numbers than I am about smoothness and lack of stuttering. I vsync at 50% and try to get 30FPS everywhere, which I mostly manage.