Not to rain on any parades, but are those videos really appropriate metrics? Well, I doubt you intended them to be just metrics, but... well, anyway. I'll get to the point. As I understand the Luna demo actually runs decently on a 6800U and the Ruby demo was intended for the r520. In other words, neither demo really pushes and shows the full potential of the gpus. Useful or not, I just wanted to comment about that.