Hi guys,
I have tested the firmware with 2 units of s9 batch Jan 2018 (auto tune). However I found a problem with the fan setting, 1 unit flashed with 650m fw, another one on stock fw, both usable with freq tuning, but the only problem is fan setting, no matter how I set it, be it on UI with hidden feature, or config file, result same.

Speed is going for a roller coaster ride, up and down all the time. I have followed the instruction on page 1, and also read all 8 pages from this forum discussion, tried everything.
Problem: Fan speed.

BTW, I live in warm country, all year round 30degree Celsius, and those miners has been placed in an air conditioned room which ambient temp is about 18-20degree c. However, I have also found a problem where the temperature rise very quickly from 15-20degree c.
Is the reading wrong or just the firmware yet be perfect? Please kindly advise.