Could you please post how many watts at the wall this is pulling... when I did my tests of voltages I could not get the wattage at the wall to change by changing the volts..
I do not have a tool to measure the pull at the wall, but if your tests showed no change, I have no reason to doubt it.
OBITER DICTA: It seems the new firmware that bitmain are testing (I got a copy from bitmain earlier today and you can ask to be sent a copy), handles voltage settings well using the default value of 0000 (I suppose that signifies auto select the voltage). I flashed one of my S3's with the firmware and in the first hour that I was able to observe, it seemed to be handling well. I will not be able to check on the rig as I am away for a couple of days, but will be able to on the 26th or 27th.
Thanks for the reply.. will said firmware be publicly avail soon? or now? would love to retest the wattage at the wall issue.