In Zcash you will mine in Hash/s and not MH so that is why the numbers came so massive. A rx 580 will do around 280 h/s take or give. Also you could ramp the eth hash rate up to 28mh if you like, 25mh is pretty low and even with my ultra undervolt under clock power save setting I get 26.5 mh.
Thanks, I didn't know this!
I found 25MH on cryptocompare.com website, I used this number as a reference in order to calculate the profit.
Since you talked about under clocking the GPU, which was my next question on this topic, can you give me more infos, please?
Is the power saving consistent? does the UnderClock influence the hash rate? Do you suggest doing this?
--edit--
Consider that I would take the 480 or the 470, not the 580.
Thanks