I have a PA-2013, same as the 503+ just ATX and my board ate up my first TNT card, tried two more new ones before vender cut me off. My friend has a 503+ and it ate up 2 VooDoo 3-3000agp cards. Fic boards suck, even heard they had problems with there first Athlon board, will never buy from them again, also have more problems with my board but I think you get the point, using a savage 3d 8MB card right now, also the trident 3d blade card worked good on this board to. Heard there is a problem if you have 16mb or more?