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 AMD does not usually go big on designing its own chipsets: its making a big exception with Hammer, its so-called eighth generation 64-bit server CPU , with the 8000 series. 
A fat CPU of course needs big bandwithd chipsets to maximise performance. AMD is trying to ensure no nasty bottlenecks with a liberal sprinkling of HyperTransport technology in its new chipset family. 
This will include "the AMD-8111 HyperTransport I/O hub, the AMD-8131 HyperTransport PCI-X tunnel, and the AMD-8151(tm) HyperTransport AGP3.0 graphics tunnel". 
 
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