I have a dell series 2002 computer..need to up grade video card to Nvidia GeForce series FX5900 or greater...a 128 MB video card with support for Pixel 2.0...don't know if I have a PCI version or AGP...Is that the slot?? Don't know anything about computers..just want to play a game I bought...will that above mentioned video card fit in my computer and work...Please help......