My device manager / display adapter / says that I have the NVIDA Quadro K600 driver correctly installed. I am currently using the new K600 card to view the single monitor. Also, when I right clicked on my screen, I see I have an app called "NVIDIA Control Panel." That app only shows one monitor, but in that app, it has an option to "Set up multiple displays." That function has the option to perform a "Rigorous Display Detection." That detection effort still did not find my second display. My second display is still connected to the original port, which I think is coming from the mother board. The old video card shows a driver of NVIDIA GenForce 6150se Nforce 430 (when the new card is removed). So it appears that my PC defaults to the new K600 card when it is installed, but once it is installed, my PC will not detect my old nForce 430 card. I also looked at the bios but did not see an option to find two video boards. Thanks again for the help here.