Yes, so this really all is moot. You can run any 2.0 card on a 1.0 - it just won't have as much bandwidth. In the case of the 9800's or 5670's, it will be enough. You just won't be able to run any higher end ones. (Just as a test I put my 9800 GTX in an old system I had with a PCI-E 1.0 slot and...