I don't know if this is the place to post this but I was looking into a laptop everything is good except the video card. How do I tell if a certain part(in this case the graphics card) is upgradeable? It's an HP ENVY dv6t quad edition. I'm reading that laptop graphics cards are built into the motherboard so basically if I don't buy it already with the computer I can't just upgrade it correct? Or can I buy it without a video card and then decide later to upgrade? Would I need to upgrade the motherboard as well? How does it work? Thanks.