Need help with ETH mining rigs

[MrD]

Hello guys,

If you are into ETH mining I need your help. Recently I've put together 7 mining rigs (totalling 35 AMD Radeon 580 cards) and minning ETH. The OS is ETHOs and I managed to put the system live at the end of last week.

However mining is new to me so I have a couple of questions I would appreciate if you can help me.

1) Why after 2 days the current hashrate dropped significantly? I checked the temperature and it's ok

2) I see on rig 13 and 15 which have 5 cards and should report around 5 x 30 MH/s report only 111 MH/s so I suppose a card is down. After a reboot the card is back online. Any clue why this is happening?

3) Do you have any tips I can increase the hash rate?

 

Thank you,

D