Now get rid of those 2 video cards in there and get yourself a 4800+ 

  Or a 5800+.  Ati's naming is silly, but you can tell what "grade" of card you have the the 100's.  If it's a 4100, it's a low end 4000.  If its a 4400, it's a low end mid range.  If it's a 4800+ its in the higher range.  Same with all other models.  3000, 4000, 5000...