My ex-brother-in-law wants dual monitors on his Dell 8400. The 8400 has a radeon x300 Series PCI Express x16 card currently. When I went to the display settings, it is already showing a #1 monitor and a #2 monitor. Strangely they both show to be the Radeon card. I tried uninstalling #2 but on reboot, it reinstalls #2. Not sure what this is all about! I have an extra monitor and a Diamond Stealth 64 Vision 968 pci that I want to set up. I went on with installing the Stealth but could never get it to work. In device manager, it has the ole yellow exclamation mark and states that the device cannot be started, error code 10. Any suggestions would be appreciated. I setup dual monitors on my Dell 8250 without a problem but I have not figured his 8400 out.