Sometimes you can. Your laptop might be able to since I think Asus does use modular graphics cards in many of their barebones laptops. You'd have to order it from them directly, though, so you'd have to call them and see what they offer. Most likely you'll be limited to an nvidia chip and probably a 7600 at that since your chipset is nvidia--that's usually the way these things work but it's still worth the call.