I have a TOshiba M40 laptop.It has a Ati Express 200 M integrated video card.I was thinking on changing it and i do not know if that is possible since it is on a laptop not on a desktop.Is my pc upgradable and if it is so what does it support.My proccesor is a Celeron M at 1500 mhz,wit 512 mb ram.That;s all the info i can give you since i am poor when it comes to computers.So please if you can help...do so.Thank you.