Thank you for your guide.
Can you share your OC setting on rx 470/480 ?

With the Claymore miner I used the same settings I used for ETH, 1150 MHz core 2000-2075 MHz memory and get between 725-775 H/s on RX 570 and 480/580.
The XMR-STAK-CPU miner also gave me a 50%+ improvement over the cpuminer-opt miner on an i7 4770 to ~325 H/s.