ok so its a p4 its unlikely you have an pci-e x16 slot or even apg so you are suck with pci cards that take pci are 5-10 years old and. wont give u that much performance and were do you live and what year do you live in p4s have been out of date for 5-6 years and 1gb of ram isnt enough to even do fb games. ill shut my mouth now before i get banned.