And finally, we did a little testing on Xbox One backward compatibility. Again, you're far more likely to see the improvement here on 60fps titles that can't quite hit the performance target consistently, but it is there - sub-30fps dips in our Alan Wake's American Nightmare testing are much reduced on the Xbox One S. GPU power isn't really the issue with Xbox One back-compat, it's more the virtualisation of Xbox 360's CPU cores, so we suspect that boosts to games with real performance issues (Mass Effect, Halo Reach etc) are unlikely, but it's good to know that the graphics clock boost does indeed apply to all areas of the system.