I recently discovered lshw, which is a tool that you run from the command line and it will print a lot of really useful information about the hardware attached to your computer. Not sure what model ATI video card came built-in with your laptop? Lshw knows.
It knows a lot more than that, too. It will also print information on your audio card, your network adapter(s), your processor(s), your expansion slots (such as PCI-E and PCI-X), your disk drive controllers, and on and on. It is really nice. Ask lshw first.