A few questions on the Antminer S9 status page
https://batlgroupimages.blob.core.windows.net:443/accessibleimages/2018-01-02.png

Three questions on the image above.

1. Why does Chain #6 chip always have a 50+ times hardware error rate than the other 2 chips, which always seem to have same number of HW's?

2. Which fan is the intake, Fan 3 or 6. Iwould assume fan 6 since intake is probably running slower than exhaust?

3. I had to upgrade firmware from Bitmain on this unit. Which was Apr 2017 version, is that the latest? Because I notice my chips are running approximately 10 deg hotter and my fan speeds are not changing and running 1000 rpm lower than they were before (likely the chip temperature rise reason) How can I get my fan speeds back up?