I had a lot of trouble finding info about whether the PCI Express 2.0 card would work with my PCI-E 1.0a board. I had read that they would not work, and others said that they did. I tried one, and it works fine with the mobo in my system specs!
Yes, 2.0 is backwards compatible with 1.0. You will not benefit from the extra bandwidth though, but I don't think you would see an improvement even if you did.
While I'm sure you're excited, it isn't anything new. It's by design.
Thanks! I know it's supposed to be backward compatible by design, but there have been reports that the Nvidia cards were not truly backward compatible with the original PCI-E 1.0a spec.
But I basically just posted this in case anyone else is searching for this type of information. I never found a single post anywhere about this card working with my exact motherboard, and DFI could not confirm that it would work, either.