I've squinted at this photo for a while, and I'm really not sure what to make of it. NVIDIA says the bridge is "bolted on", but these chip designs are modular, so what else should we expect? NVIDIA also claims the ATI internal bridge can't run at PCIe X16 bandwidth, but only AGP 8X speeds. Anyone with a good idea how to verify that should shoot me some mail.
One also wonders, seeing these accusations from NVIDIA, about the nature of the widely rumored NV45's built-in PCI Express interface. Perhaps NVIDIA drew from its own experience in developing its theories about ATI, no? Just asking.