Even though we've seen some documents that made it very clear that the NV41 will end up with 6700 name, our better informed moles told us that this won't happen. From the beginning, Nvidia wanted to make some kind of cheaper to produce 6800 standard card and that's what NV41 is all about. There is a slight change of interface as NV41 is PCI Express. It will use exactly the same clock speeds as the 6800 Standard AGP card. NV41 based cards will be branded as Geforce 6800 PCIe and will come as PCIe cards only.
News source: The Inquirer