Whatsminer M3X version 2.0 mining at 8 TH/s!

[Endikadija]

Recently I have put to work 23 Whatsminer M3X. 20 pieces which are model 2.2 hash normally at 12 TH/s. On the other side 3 pieces which are model 2.0 hash at around 8 TH/s  with all 3 active boards.They have the latest firmware.Kernal log seems ok.Any idea what could be the problem?

[favebook]

Posting Kernel Logs and some pictures would be helpful. There is not much we can tell you to try unless we know what the problem might be.