Hi Tazers,
Thank you for your reply.
The first step of your Upgrade Instructions is to Flash Fixed Frequency firmware.
That's why I thought I need to replace the auto-freq firmware with the older fix-650M one, before I can replace the bmminer.sh with your modified version.
Now you say I don't have to do the first step? Just want to confirm that.
Okay, if you said that, then I will skip the first step and go to the next ones. Hope it will works.
Thanks again.
You only need to flash the fixed frequency firmware in order to gain the controls on the dashboard for fan control. If you use the stock firmware it will still work just fine except the antminer will adjust the fan for the given temperature which honestly works just fine as well. The ability to change fan speed was more so to make the miner run quiet if needed.