Hi cbrown, welcome to the PCHF!
It sounds like you're trying to install some corrupt drivers.
Boot into safe mode, clear off all the drivers from your previous video card and the current video card. And also uninstall your chipset drivers.
Once this is complete, reinstall your chipset drivers, and then proceed to install the video card drivers from here....
The Guru of 3D Download Section
Restart computer, and see what happens.