From neolib on SI FWIW..............It pays to note that Keller was only at AMD for about 2 years (1998 -99) where he "helped launch the K7" and was lead architect on the K8. But he left WAY before the K8 debuted. So he has done the same thing now with Zen. The difference is he worked on Zen for about 3 years, significantly more than he did on the K8