Miner Configuration Tab. "Customize the fan speed percentage."
Not on a S9.
I am looking at it on an S9. Miner Configuration Tab, Under the General Settings sub tab, at the bottom. It's on all of my S9's, regardless of batch & firmware version.
You must have all s9v1. There are no other tabs under gereral settings. All my firmware is of April of this year though. Let me know if it has changed in newer fw.
Ah! That could explain it. I live by the creed, that "If it ain't broke, don't fix it." I don't update firmware unless it fixes a problem I am having. I've had far more disastrous results from performing upgrades of firmware, software, operating systems, etc. over time than I have had positive results if I just upgraded for the sole reason that an upgrade exists. I find that I either lose functionality in some way or run into other problems more often than I see something "new and improved" come out of it. So, I only upgrade if the upgrade or patch actually targets and fixes a problem I am having or is absolutely necessary for continued functionality.