Hi, I am a beginner here and as miner, yesterday I put the first GPU and I chose  Strix Radeon RX 570  4gb.

CPU  I3
Windows 7 pro 64bit  without any upgrade need to do today.

yesterday installed  driver and OC sofware called GPU Tweak II and began to play moving clocks to  gpu 1200  and 1850 memory.

after install Minergate to check   with ETH  I have  only 12 mh/s    my son  in his gaming computer with amd fx9590  and gpu gtx 1060 6gb  have in Minergate 23 mh/s without OC or any bios change.

I am sure that I have more than one mistake,  where to begin?  

workload mode   ( how to do )
check gpu error  ( how to check )
blockchain bios     ( is ok  this  Radeon Software Crimson ReLive Edition Beta for [Suspicious link removed]pute Driver for Windows® 7 64/32 bit​ )
OC   1100/2000 -0.2v     ( ok  with  GPU Tweak II )

ETH bios mod    ( how to do )

this is the beginner mode