I was just wondering if anyone could kind of explain to me how mobile video cards work. Can you say add a card to an existing laptop? Replace one in an laptop? Or are you just pretty much stuck with what you got? I am asking because i am looking into buying a new laptop but was wondering if i could save some cash up front and get a card later (or get a low end card then upgrade). I don't care about being able to play the lattest games maxed out, but would like to option to play games if i so desire. Thank you before hand for any info / advice.