Fwiw on Bulldozer being backward compatible, Tech Report is saying they "expect compatibility............although specifics about that are still murky." Notably though is that they confirmed that they are compatible with current C32 and G34 for the server side. Maybe that is why they think there might be a chance for AM3 compatibility? Your absolutely right but the real question is why? Not even the 6 core/12 thread Westmere chips fully use triple channel for high end desktop though it would be a great feature on server systems. Now some will say what about the gpu being moved on die. With the rumor of a maximum of ~400 SP being on a Llano some would argue that adding more channels would be beneficial here. Thing is more channels require more die room being reserved for that. Why not just support higher frequencies instead? Save die space for something else (or just take the space savings and the power you save too). If I'm not mistaken, dual channel with 1866mhz memory has higher bandwidth than the current Intel triple channel that is on the 9xx chips (obviously this is generally speaking).