NVIDIA GeForce 6800 GT PCI Express

NVIDIA employed a markedly different strategy for PCI Express than their primary rivals, ATI. Whilst ATI were redeveloping numerous chips to include a native PCI Express interface, NVIDIA clearly decided that it was more important they transition their to their new NV4x architecture, and opted not to initially design native PCI Express chips (until the recently announced GeForce 6600), but instead design a bridge chip in order to allow an AGP graphics chip to operate on a PCI Express bus, or even vice versa.