AMD Ontario, Zacate Die Sizes - Take 2

Earlier I asked if AMD's leaked Bobcat based Fusion processor die shots were real or another PR show off, this update sets some ideas straight.

Supposedly, those squares on the top are the cores. This may be feasible if we take a look at the floor plan of the Bobcat core that AMD provided:

 

Now take a look at the picture of the core:

 

 Yup, it sure looks like we have cores on the top of the die. The problem here is that this is not the actual picture of the core, neither those are shaders.

Consider the components one should expect in this CPU, like the ones present in most of a current AMD integrated chipset like the AMD 790GX/780G:

 

It has 40 shaders and have a look at the actual die:

Not like anything we see on the supposed Bobcat die shot, so it's safe to assume that is not the actual core.

Shader estimates point that it could have 80 shader processors inside, on an estimated die size of roughly 74mm². The 780G/790GX has 40 SPs in a die size that would be around 35mm² in a 40nm process at TSMC, which amounts to 50mm² when coupled with the two Bobcat cores. There is also added logic but the remaining 25mm² can accommodate an extra 40 SPs, or possibly 80 SPs, and some extra logic required to "glue" everything together.

Given the estimates on die size and performance features, everything is looking up for AMD's new Atom killer.