ithehappy
Try to make custom resolution with 72 Hz refreshrate. It works in more cases. 48 Hz works very rarely.
mashingan
The best you can do to reduce the artifact is by changing target frame rate to 2x or 3x instead of to target display refresh rate
It is not so. When you watch 48 fps at 60 Hz display you see some frames twice. To reduce visibility of artifacts It must be only source frames not interpolated. So I recommend use 2m Frames interpolation mode with Target frame rate To screen refreshrate. It is the same 2x but doubleframes are garantee source frames.