Is PCI backward compatible. 2

[chylok]

I've got some old data logger PCI cards which I need to get running on a new system. Looking at a dual xeon system but it's only got a PCI-x bus.

Does anyone know if the PCI standard is backward compatible? For example will a PCI card (32BIT) work on a PCI-X bus (64BIT)? Will a PCI card work on a PCI-E (Express)bus.
Any advice will be greatly welcomed!

 

[SjrH]

You can upsize, but not downsize...

http://zone.ni.com/devzone/conceptd.nsf/webmain/605EFE8126ED4DB686257014006BC124

 

[Frank4d]

First, PCI-X and PCIe are not the same.

You can plug PCI cards into a PCI-X backplane. Maximum bus speed will be dictated by the slower PCI card.

You cannot plug a PCIe (PCI Express) card into either a PCI or PCI-X card slot. The standards are not compatible.

 

[chylok]

So it looks like the cards should work on the PCI-x bus. Thanks for the advice.