Re: Getting a AGP vid card to work!!
Keep the PCI card just in case. It's hard to say if it will work right away. We're hoping it would. Double check BIOS for video interface used (PCI, AGP), check monitor connections, video card connections. See if you can boot up in Safe Mode. When you do install the new video card, delete the old Display adapter and install new drivers for the new video card.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?