Thx jstefanop.
Testing my ten L3+ with lowest voltage (0xfe). Currently running 400 frequency.
Can this set frequency for each board individually?
for example :
board 1,2,3 running very smooth on 450 frequency & voltage 0xc0 with less HW
board 4 cant go over 400 no mater how high is voltage (0x30) , too much HW (error every sec)
No since tuning voltage and frequency for each board is redundant and way more complicated than it needs to be. You just choose a frequency you want to run, and then tune the voltage on each board. Sounds to me like you have a faulty board....there are some boards that will just produce more errors regardless of what voltage/frequency you set (i.e. some chips just have logic defects that will produce errors even if the frequency/voltage is low/high enough).