Yeah i'm very sure it's PCI and not PCI express, I wanted to use an old PCI card because the 2nd monitor will do nothing more then display a database input screen. I have since done the same thing to my work computer (windows xp pro) .... I have an on board Nvidia 6100 and i borrowed a PCI card which is an Nvidia 6200. At first i was getting the same thing whereas one of the cards would get disabled but then i removed the drivers for the on board card and plugged the monitor into the PCI card and then that became the primary display, it asked for the drivers when it got into windows and whal