When you're editing the BIOS, you need to set PER11 to 0 as well. Example from my the ROM I flashed to my 750:
I started out with just setting RPM11, PER01 and RPM01 to 0 (as per the guide) and was running into an issue where the motor in the fan on my 750 was clicking and OHM was reporting the fan was running at 32% (though the fan was not actually spinning). So, I dumped the ROM from my EVGA 970 FTW and noticed that PER11 was also set to 0. I made the same change to my 750 ROM and reflashed and the clicking had stopped and the fan speed was reporting 0% at idle.
From what I can gather, RPM/TMP/PER11 through 13 are the three fan steps the card will use by default: low, medium and high. I think the motor click was because the RPM value was removed, but the fan percentage (I think that's what its referring to, correct me if I'm wrong) was still set to the stock value.