good luck, man! 
and I hope you really have an entire farm of rx560, because it's probably not worth it otherwise ://
as for me, I finally managed to get all the 6 GPUs to work together... 13,8 MH/s is the best I can get for now in a completely stabile system, using priviet bios (THANKS, priviet!!!) and 1100MHz GPU clock + 2040MHz memory clock set in MSI Afterburn
i managed to go over 14, but i'm gonna let it run like this for a while before i do some additional tweeking
best,
and I hope you really have an entire farm of rx560, because it's probably not worth it otherwise ://
as for me, I finally managed to get all the 6 GPUs to work together... 13,8 MH/s is the best I can get for now in a completely stabile system, using priviet bios (THANKS, priviet!!!) and 1100MHz GPU clock + 2040MHz memory clock set in MSI Afterburn
i managed to go over 14, but i'm gonna let it run like this for a while before i do some additional tweeking
best,