So Interesting fun fact. My new S9's some have firmware from July, while others have firmware from Nov 17, and a version like S9_V2.54 But on their website, they only have the newest from Aug 15.. Now Why would they not have the newest one on there? I had an issue with the first S9 I got like a month ago, with fan speed ramping constantly, the firmware fixed that so it stayed on more consistent. So Now I am baffled if I should overwrite the Nov 17 with the Aug 15 that had better fan control.
Any opinions?
They probably sent you refurbished miners or miners they used in their farm/hashnest.
If the miner is working properly, don't change the firmware. There have been stories of people bricking machines with newer firmware.