you cant upgrade a note book.
yes you can buy them with different gfx card options but you cant take the card out and swap it with another 1s it leaves the factory.
just because they say you can buy this or that upgrade on there site. it doesnt mean you can upgrade the lappy with after market parts.
you wasted your money on that game for that hardware... next time read the back of the box and see if your near minimum spec.