UPDATE: I put the card back in the first slot and reverted the BIOS setting. I haven't been able to check the operation of the driver due to the fact that when I attempt to boot, it gets to what should be the login screen, then the screen stays black while the monitor backlight flashes on and off. Even Ctrl-Alt-F1 can't get me out of it. It looks like I'll need to boot off the install disk and do something, but what?