I'm going to explain the situation;

Because of the config of the rack where  I have my miners (with the cables on the back -hot aisle-)
when I got my S9's I inverted the fans of the miner effectively changing the airflow direction,
and they have been operating in that configuration for a few months now, this are the temps I get:


http://i.imgur.com/xCZ1Gwt.jpg



now, I decide to finally take care of the cable config of my rack, and proceed and reverse the
fans config off the first S9, this is what happen:


http://i.imgur.com/YxelbzZ.jpg


as you can see there's a 15-16° difference between the 2 settings, anybody has try this?? I thought maybe
the temp sensor is closer to one fan in one config and maybe that's why, but the difference is also
on the chip temp reading, I assume the chip temp sensor is embedded within the hashing chip like most PC's CPU's,
so the temp reading have to be accurate.

any thoughts on this?