Is this the new firmware or the new new firmware that is about to be released!!!!
I think he is talking about the new firmware which already released with a power efficiency.
You can do some experiment if you unplug the blue wire but if this wire is unplug I'm sure the fan will force to run at 100% speed(but to him it blocked to run at full speed). You can test it and let see if it can help to improve efficiency but I guess the fan will eat much power vs lowering the chip temp.