With experimenting more with motion reprojection, I am finding that now I am no longer GPU Limited, but “Limited by Main Thread” which I haven’t seen at all since upgrading to the Ryzen 5600x CPU (even running at 4k).
As soon as I turn off motion reprojection, I am GPU Limited again.
What is really strange is it worked really well for about an hour, but now I can no longer get motion reprojection to stay on.