Hi

Thank you for this.

I have installed the bmminer880 mod, using the auto-freq default firmware.
I don't have in my house a bitmain 1600 psu. I have EVGA G2 Gold-1600 watts.

I am running one of my S9 13.5 at 700 , and its giving around 14.9 Th/s. Good stable for about 30 mins. Good temps below 86 for chip2.

At 725 it gave me a little bit more : ideal-15.6, avg: 15.3 Th/s- good stable for about 15 mins.  Good temps below 87 for chip2.

At 750 it gave me a little bit more : ideal 16.159, avg: 15.7 Th/s - good stable for about 15-20 mins.  Good temps below 90 for chip2.

Few hardware errors in two of the cards
chain 6: 1 Hw-error
chain 7: 7 Hw-errors
chain 8: 0 Hw-errors

At 800  it gave me a little bit more : ideal 17.236, avg: 16.4 Th/s - good stable for about 15-30 mins.  Good temps below 94 for chip2.

This one game me more hardware errors

chain 6: 40 Hw-errors
chain 7: 45 Hw-errors
chain 8: 3 Hw-error

It also seems the discarded increases a lot when running at 800, and the pool does not reach expected high values for hash rate. Maybe an observation issue... but just reporting.

I am afraid of increasing the Freq above 800. I will repeat the above tomorrow to try to measure the power draw at the wall. Will report if I can make it.

In any case This is AWESOME! Thanks!

- esr