I haven't benchmarked the GPU in any way because I'm not a gamer. However, as soon as the GPU driver was available I installed it and immediately noticed that a

I haven't benchmarked the GPU in any way because I'm not a gamer. However, as soon as the GPU driver was available I installed it and immediately noticed that all desktop graphics and video were fast/smooth as you'd expect on macOS/Windows. I did open the only game I had installed (Extreme Tux Racer, which ran poorly before), and it also ran fast/smooth.