Amazingly, when going from 1080p to 4K we only see a 23% reduction in performance when looking at the GTX 980 Ti. This could suggest that we are running into some kind of performance bottleneck at 1080p. Again, the GTX 980 Ti was slightly faster when using DX11 and was faster than the Fury X in either rendering mode.
Surprisingly, turning MSAA off had almost no impact on performance as the GTX 980 Ti maxed out at 42fps while the Fury X managed 42fps when using DX12.