Upgrade my video card on notebook????

ok i want a new video card on mine notebook. Its a mx7527 and has ati x600. if i can what is the best video card i can get for a 15" notebook?|||You can't upgrade the video card in a laptop. Usually the video card is built in with the motherboard, so there is not way you can remove the existing video card. The only upgrades you can make to a laptop is increasing memory capacity, changing the media drive bays, or changing any aesthetic features on the laptop.