On Mon, Nov 17, 2003 at 01:55:05PM -0800, marc.miller@amd.com wrote: > AGP (and PCI-X) are in the chipsets, not the processor. > AMD 8151 is one of the AGP chipsets available, and the AMD 8131 is the matching PCI-X chipset. In all systems I've seen so far (and written GART drivers for) the 8131 doesn't really do anything. It just shadows the AGP registers in the per-cpu northbridge. Dave