Hi,
ethereum is now in a phase where mining (with profit) stops because nodes will be sufficient when POS..https://github.com/ethereum/wiki/wiki/Proof-of-Stake-FAQ,
so the question is: whats the best card for zec & other coins..(lo-power)
check mining profitability calculators also...
(& get amd-stock!!http://www.nasdaq.com/symbol/amd) cuzz the world needz democracy!;)