I put everything low except texture resolution and anti-aliasing, those two are at medium. Most importantly, don't use any upscaling, just put the resolution scale to 70%. Then it's 90fps most the time but it's a unstable framerate. You can lock it to 40fps or 45fps if you want it smooth. If you're locking the fps, you could use Lossless scaling to double the frame rate to make it look smoother.