I bought a Dell Dimension 9200 in December with an Nvidia GeForce 7900 GS Dual DVI PCIe video card. I wanted to add a third LCD panel and thought I could just buy a PCI video card, plug it in and go. I bought a EVGA e-GeForce MX4000 PCI card from Tiger Direct. When I installed it, all I could get were blue screens saying there was some kind of conflict. I uninstalled the card and had to download the 7900 video drivers from Dell to get back to where I started. Is it possible to just add a second card in the PCI slot for a third monitor when the PCIe slot is already occupied?