Hello Doktore 
Why hashrate ramdomly drops, sometimes it works almost whole day, sometimes just few hours/minutes than drop(form
~55mhs to ~50mhs on RX470 4g), than I restart , and all normal.., and after sometime all same....restart....
Sometimes hashrate drops on all rigs at same time, sometimes there is difference in few hours before it drop on all rigs.
Other than this all cards are stable. Your miner is better than nanominer. On nanominer there is no drop, but speed is same as srbminer when hashrate drops
Hashrate drop is confirmed on pool
Also power consumption is lower on your miner
I use hiveos. I tried 0.6.8 and same.
Why hashrate ramdomly drops, sometimes it works almost whole day, sometimes just few hours/minutes than drop(form
~55mhs to ~50mhs on RX470 4g), than I restart , and all normal.., and after sometime all same....restart....
Sometimes hashrate drops on all rigs at same time, sometimes there is difference in few hours before it drop on all rigs.
Other than this all cards are stable. Your miner is better than nanominer. On nanominer there is no drop, but speed is same as srbminer when hashrate drops
Hashrate drop is confirmed on pool
Also power consumption is lower on your miner
I use hiveos. I tried 0.6.8 and same.