Hi ChrisM,
Don't despair, you haven't wasted your money on buying that new card, it's just not configured correctly or maybe the fs9.cfg file is messed up like Jared implied, though your GRAPHICS CARD INFORMATION
shows that it's detected correctly.
What we actually need to help you here is your "chipset" info which we get by googling up your mainboard details. In order to do that we need your mainboard model number and revision if possible, and if you provide the correct info, we can go further.
The "delete" key must be pressed immediately after the RAM count appears on the boot screen to enter BIOS settings, and indeed, it may not even be the delete key, as some boards use different keys to enter bios settings. Consult your manual or download one if you need it to find out what keypress to use.
Sometimes boot screens are hidden with a bios option which enables a splash screen logo instead, if you get to bios, it's a good idea to turn that option off so you can see what's going on at bootup. Boot Logo screens are pretty effective at keeping you in the dark about your system specs and configuration.
Basically, once in the bios settings (or CMOS settings), you want to set your AGP aperature or "window", set your agp multiplier to 8x if your mainboard supports it, and enable any other support in there your AGP graphics card needs.
Your upgrade should be producing profound improvements in your graphics display, once you see the effects of it, you will be very happy indeed.


Mainboard: Asus P5K-Premium, CPU=Intel E6850 @ x8x450fsb 3.6ghz, RAM: 4gb PC8500 Team Dark, Video: NV8800GT, HDD: 2x1Tb Samsung F3 RAID-0 + 1Tb F3, PSU: Antec 550 Basiq, OS: Win7x64, Display: 24&