Yes, but the chart shows GPU-only power consumption numbers, and I see a whole bunch of random and obscure cards. And how do you measure the power consumption of an IGP like the GMA 900 anyway?
All of that leads me to believe that someone simply compiled a bunch of numbers from manufacturer specs. The main problem being one manufacturer might measure or determine power consumption by different standards than another (which is the case with Intel and AMD's TDP specs).
What I'm getting at here is that it would be a handy chart if everything else was equal, and all the cards were tested in real world conditions using the same platform (or at least very similar ones - I realize that some of the cards are AGP). Otherwise, any comparisons might not be valid.