I also have one asic with 55 not 60. Sometimes it goes to 57 or 54. Also i have a lot of HW errros like 50 per second. But i know that it does not matter too much. I can see actually at the pool what's going on. So i suggest you check the pool for hashrate.
Some HW errors are not a problem. One of my boards is going to die but i will keep until it stops totally. Then i am going to change capacitors at the last row. I think they may be the problem for not supplying steady voltage.

stangerm2 -
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