Quote Originally Posted by 003 View Post
It means that two Bulldozer cores will only be 80% faster than a single K10.5 core, not 100% (like a dual core K10.5), or more preferably, over 2.0x as it should be with a new microarchitecture. They are trading off performance in order to add more cores.
No.

It doesn't meen 2 Bulldozer "cores" will be only 80% faster than 1 K10.5 core they aren't even comparing K10.5... 1 Bulldozer Module will be faster than 2 K10.5 cores by good margins.

With Bulldozer comes CMT "Cluster Multi-Threading" which will basically have 2 "cores" in 1 "Bulldozer Module" - one CMT unit. With one of the Integer Schedulers working we have a performance number of 1. With both Integer Schedulers working in one of these "modules" we will see a performance number of 1.8.

But what do these performance numbers represent, at the moment noone knows, but each Bulldozer "core" will definitely be faster than a K10.5 core that is for sure.