The execution cores are not different compared to desktop-segment FX-models.
The CNB part of the UNB is pretty much identical between the two (Trinity lacking the L3 of course), however on Trinity it is highly optimized for power consumption and therefore much more complicated. The GNB part is a whole another story
UNB = Unified Northbridge == (CNB = Core Northbridge, GNB = Graphics Northbridge)
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