???Hi guys and gals. I have recently upgraded from 2 s4's to 3 s7's  (4.73 th/s)plus 1 s9  ( april batch )
My question is - I have the #1 board on an s7 ( dual fan) running at 81*+ . after replacing the control board with a new one , the hot board #1 continues.
 If replacing the hash board, how do I determine which is #1 ? Thank you