bouth 30 pc. of Sapphire RX560 4GB. you know what that was the best buy. For that moment price was 104 Euros for card.
BTCRigs are working very stable 4-5 weeks. Each cards give 15.1 mh (Eth/Etc/Exp/Msc) + 110 mh/s DCR
https://i.imgur.com/j8myM4D.png how you get 15.xx mh/s, please can you share your bios and explain your modify?