Hi Friends!

Can You advise me- what better to buy to have more H/s in minnig ZEC and spend less electricity?

Which card(s) is more profitable for minning ?

rx390x - 495$

rx390 -  420$

two rx470 4GB ram- 250$   or

two rx470 8GB ram- 304$  (do i need more RAM for mine ZEC or anything else?)

two rx480 8GB ram- 329$

Thank You So much!