I think the OP is pointing out that you can use much older hardware (and no warranty issues if so) to do some mining without waiting for the mail from China with the risers in it (or paying through the nose for US shipped ones). This is a good way to repurpose older hardware that you may have lying around.
I have access to a few older PC's that only have X1 slots, and I may buy some of the 7790's on sale now at newegg and use this to mount them properly in the case. Thanks for the idea
Why a 7790? is the price point just right for that gpu? the power draw of a 7850/7950/7970 too much for an old LGA775 mobo? limited by PSU capacity\connections? Sorry for all the questions but there is a bunch of old hardware in my basement begging for new/used GPUs.