I would never recommend the GeForce 7300 for any kind of gaming. It's an entry level video card that's barely able tp properly run anything but very old 3D games... Unless minimum settings and slide shows are you things.
The recommendation made by roparadi is at least 5 times faster if not more when running video games. With it, you should be able to run Modern Warfare with High settings, even maximum maybe depending on your screen resolution or your tolerance for low frame rates.
