Riddle me this batman

Why/how would moving an S9 from one pool to another make the stupid fans run faster? Is it possible that the miner works harder on a non Antpool connection?
I dont want to say these things are whisper quiet now but the sound difference is very noticeable between when I'm connected to Antpool and when I'm not. As in, Antpool is quieter.

What!? Can you see that the fan RPMs are lower on Antpool vs another? Or is it just the "sound" of the fans?! This is really interesting!