http://www.techradar.com/news/amds-vega-64-graphics-card-easily-outraces-nvidias-gtx-1080-ti-in-forza-7

As we saw in our review of the Radeon RX Vega 64, generally speaking, the graphics card offers roughly equivalent performance to Nvidia’s GTX 1080 – but not in Forza 7, where in a surprising turn of events the Vega 64 outstrips the GTX 1080 Ti by a good amount.

Yes, we said the GTX 1080 Ti, Nvidia’s powerhouse GPU which is a lofty step above the vanilla GTX 1080. And when running Forza 7 in DX12, AMD’s Vega 64 beat the 1080 Ti by no less than 23% in Full HD resolution.