text: how do i get a compaq deskpro p3 500mhz to recogize a new pci card? every pci device i install is not listed or recognized by the bios.  i cannot get a pci card to work except for their network card. compaq is pretty much a proprietary computer, meaning that you may not be able to get a non compaq pci card to work with their mother board....there are some good bits of advice listed by the other answerer's here.  try them, and good luck