Hi I am interested in upgrading my graphix card i have the Ati 300SE PCE. has any one upgraded one of these to like a nvidia 6800 ect....?

can not find any post on the Dimension 5000 so thought i would ask.

only interested if some one has done it not if it is just theoretical!

i found this like but just seems to be theoretical!
http://forums.us.dell.com/supportforums/board/message?board.id=dim_video&message.id=120716&jump=true

thanks