I tested HIVEOS few weeks ago on ETH and h/s for my configuration is much lower than in windows. I try OC but no results. I see you also have RX 560 and I am interested what options you using to achieve good h/s?
My cards are Asus ROG RX 560 EVO 4GB with 2 fans and no power connector.
Also, bios that I use is unlocked 8 gpu of 12, but 4 gpu are still 896 shaders. All cards are brought in same package and have serial numbers in a row...
In win I achieve about 166 MH/s for all 12 gpu. It is result of fine tuning OC per card, from 1050/1900 mhz to 1075/2000 - probably depends of silicon lot