AMD’s Hammer Architecture – Making Sense of it All
"Judging a book by its cover alone would mean that AMD's Hammer architecture would be used in the first 64-bit x86 microprocessors. We already know that Intel has taken a route away from x86 for their 64-bit solution, Itanium which uses a new instruction set architecture (ISA) called EPIC. The point of this article is to not only examine the pros and cons of AMD's extension of the 32-bit x86 ISA but also the rest of the story when it comes to Hammer since there is a lot more to this architecture than a few more registers and greater memory addressability." Anandtech explains it all for you.