2004-10-XX Nvidia NV45 NV40 with PCI-Express support, for the enthusiast segment. Performance identical, but adds PCI Express support. The Ultra version (> 500 MHz) is called NV45 U.
2005-Q2 Nvidia NV48 DX9.0c graphics chip. Later said to be canceled as performance was only 20 MHz faster than NV45. Even later said to be ok again but moved from 04-Q4 to 05-Q2...