He was essentially telling the game, "Yes, I have what you need," while secretly forcing his CPU to do the heavy lifting his graphics card couldn't handle.
If you need the old behavior, use this. Do not run it on production machines. If you’re curious, check the toggles and read the lab notes.
Under , set the Feature level limit to the required version (e.g., 11_0 or 11_1).
Check the box for "Force Warp" and set the "Feature level limit" to the version required (e.g., 11_1). Apply: Click Apply and then OK . Important Warnings