i may be wrong, but to my knowledge a riser card is just a physical extention of the bus, and uses no resources of its own. If it is a riser card that converts a single slot to two or more slots, then ...

PCI and PCI-X are not directly compatible, and you’d be forgiven for thinking that means you’re out of luck if you need to use a PCI-X card in a machine that only has basic PCI slots. And yet, that ...