Quote Originally Posted by Jowy Atreides View Post
From 1120 5d in barts to 1920 4d vliw tweaked in cayman alone is a 71% increase.
Factor in the ipc improvement, the much larger framebuffer, the new offload tesselation engine and you have a very feasible 80% bump in speed.

Edit: Don't forget the clockspeed being 860Mhz compared to the 725Mhz of Barts xt.

Think about the logical evidence of the architectural changes shown above and you'll most likely conclude like myself, that the 580 is NOT going to be serious competition.
A lot of that is based on unknowns, how will games scale 4D - 5D, how will the launch drivers be, etc. The GTX 580 seems only okay, there's definitely an opportunity for AMD to strike a heavy blow here if they can pull it off/if they are again looking to compete in the high end single gpu segment. I'm hoping they deliver though.