which card need to buy ?(Mining Edition)

[mnbv172]

Hi
I have 3 choise

-MSI RX 470 ARMOR MINING 4GB GDDR5     370$
-Sapphire RX 470 MINING Edition 4GB GDDR5 Samsung Memory IO   370$
-OSTAR RX 570 4GB GDDR5 MINING  395$

I wanna to buy 4 gpu  so let me know
thanks

[Vann]

IMO, the Sapphire would be the best choice since it says it has Samsung memory. The Sapphire was the same mining edition card sold on Newegg. Never heard of the other two.