Probably will not work. Reason is that the 8800 is a non-Fermi and the GTX 460 is Fermi. Don't think they play nice together especially when folding.
But as you say it's worth a try. I still have 1 or 2 8800's lying around that for the cost of shipping I'd send to someone. Still in box I received in so should still work but not guaranteed.
Rick
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