I connected two following ethOS miners to Ethermine mining pool (https://ethermine.org).
You can see dashboard of my address here: https://ethermine.org/miners/0x5Bf39b56e6e1698A01A5116e308e9CDf38787C7d/dashboard
While both miners have similar GPUs as follows:
Miner 1: Worker name: 3b8f42
Miner 2: Worker name: 3b903c
However, as you can see in my address dashboard ( Link to dashboard ) in Worker table at the bottom of the page, Miner_2 (with Worker name of 3b903c) is always significantly faster than Miner_1 (with Worker name of 3b8f42). While Hash-rate of 3b903c is around 36.7 MH/s, Hash-rate of 3b8f42 is around 18.1 MH/s .
Another strange thing is that when Hash-rate of a miner is increased, Hash-rate of another miner is decreased ! such that always the average Hash-rate of both miners remains around 50 MH/s !
What is the reason?