Bulldozer: where are past the 800 million transistors?

And no, the Bulldozer would not 2 billion transistors, but only 1.2 billion...

At the launch of the new FX-Series (Zambezi) processors on psychopharmacology Bulldozer, AMD had indicated that these chips contained 2 billion transistors. Be more than twice as more than a Phenom II X 6, a record for a chip x 86. Yet, there are a few days, the PC Games Hardware website indicated that AMD had confirmed that the Bulldozer had finally 1.2 billion transistors. And today, said AnandTech have been contacted by AMD was asked to amend its articles on the Bulldozer processors to replace the 2 billion transistors by 1.2 billion.

What changes in the density of transistors on chips gives x 86 engraved in 32 nm, relegating the Bulldozer behind the Sandy Bridge-E and the Westmere of Intel, respectively to 5.22 and 4.72 million transistors to the mm², against 3.81 million in mm² for Zambezi processors (and 6.35 million to the mm² on the basis of 2 billion). However, as explained by our colleagues of Hardware .fr, none of these figures would be correct, and according to a specialist dies of processors, the Bulldozer are approximately 1.6 billion transistors... Which has no impact to the consumer, who looks to reason, the price/performance ratio. And do not rely on us to count the number of transistors of a Bulldozer...