u cant get an agp unless u buy a whole new motherboard, agop adn pc are even remotely similar, even in size agp is quite larger and faster.......and u cannot get pci-express for a pci slot, u need a pci-express slot and only the newest and most expensive computers have pci-express slot, which is by far the fastest. Ati radeon cards seem to be made in pci still, maybe try a 9200 or somthing low because it isn't worth pouring a lot of money into a pci card