and Bulldozer module:
4 modules / 8 integer cores in Orochi ~ ("is equivalent to") 4 cores / 8 threads in Sandy Bridge
The die size of the Bulldozer *module* is slightly larger than the SNB *core*. AMD wanted to call it 8 cores for a reason, but the cores are far from independent dual core (so-called "chip multiprocessor") as lots of resources are shared between the two (see the picture below). It is somewhere between dual core and HT core. Saying Orochi 8 core is not significantly better than SNB 4 core is like saying Radeon HD 6850 960 stream processors is not significantly better than GTX 460 336 stream processors; you can't compare just the number of sp without considering the architectural differences (not a good analogy, of course).
MCH -> FCH? Memory controller is on the chip (since 2003).
Source. Note that the figure does not look correct in two points: