Quote Originally Posted by Opteron146 View Post
The stuff that is not doubled is the 3Dnow! legacy area, no need to double, 'cause there is no need to double 3DNow! ;-)
What? But I want 128Bit 3DNow! Pro++.

And there is still wasted space, if they had the resources for a complete overhaul on the layout they would save some, and possibly increase performance.