And the best GPU of June 2017 is ... cost/income

WTF ?!

Yes, this GPU cost to me 100$ and bring me a nice 320 sol/s (who make 70$ of Zcash per month)
Well she is gonna be useles soon, but funny how a old card is so worth it at the moment haha :p

U can check this here https://whattomine.com/coins select 280x ^^