I surprised amd/nvidia havent started making specialized GPUs for mining to be honest.
I think these days they're selling more of them for mining and less for gaming.
I hope that day won't come or at least they won't succeed because that's basically an ASIC mining we're seeing on bitcoin,litecoin,dash...etc. today, of course that's considering they wouldn't have any output connectors and couldn't be used for anything than mining.
Huge frown upon that idea!

Main idea of gpu mining is so everybody can get into this -
decentralization! not only some mega rich guys/companies or whatever...