Someone asked so here it is...this BIOS is for this card only (not v2, which is worse, but you can probably try same strap
with lower hashrate)

https://www.gigabyte.com/Graphics-Card/GV-RX560GAMING-OC-4GD-rev-10#kf


BIOS link:

https://goo.gl/QikERJ

Your result may vary (silicon lottery, worse cooling - because I replaced thermal paste with Arctic Cooling MX3, as
original one is not good at all, etc)

I played a bit more and managed to get hashrate to flow between 16.5 and 17.1 in Phoenixminer, but with
some memory errors in HWinfo , so I consider this the best I managed to get)