Hello and welcome to the forums
9800MGT/GS are both outdated,so its hard to find any notebooks with this cards.They're replaced by faster models.
But i think ASUS G50 has Nvidia 9800MGS.
I am trying to find how to click to record this as my best answer but there is no 'gold cup' to click on as I was directed.
maybe only you get option if there are more than 1 answers.