Quote from: the machine on June 14, 2018, 10:35:45 PM

I have HW errors too. But only at one chain. About 2000 HW per 12 hours. How can I resolve this problem?

Frequency 450M, chips temperature is 69, 67 and 68. Hashrate now is about 15 GH/s. I was downspeed my miner but HW on one chain continue to be.

May be I should write to bitmain support? WHat do you think?

By the way, what is HW errors? All chips on all 3 chains are Ok.

There is not much you can do about it. You have to live with it. Bitmain won't help you. I tried several times.
The only thing you can do is get a custom firmware. You will get rid of the HW errors and you can also lower the power consumption but keep in mind you will void your warranty.