For me this S9j is not that good when using Braiins OS+, I have one in my mini farm and the rest are S9's. With autotunning all S9's do above 15.5 ths and the S9j does 15.1 ths for example. I have one S9 that does 16.3 ths with power limit od 1400 W. All miners are set to 1400W, autotunning on, temeprature auto, and fans go high and low all the time, which I found normal as the temperature is gettinf higher, the fana keep going to higher RPMs
My question would be, why does this go up to 16.3 ths on 1400W and other 15.5 on 1500W limit!? Did anyone tried to mess up the wattage and frequencies to get more THs? Does this depends on the state of hash boards? I preffer a low power modes but I am setting this up for my friend and he wants to mine as much as he can, for now it doesn't matter how the miners get.
All 4 were on different firmwares, so if anyone needs help with installing the Braiins OS+ on their S9's, I will gladly help!