Smi Mptool Sm32x Sm34x Smi Mass Production Tool Extra Quality -

SM34x (especially SM3281) run hot during writes. Extra Quality Fix: In UFD_MP.INI, add:

[ISP]
REDUCECLOCK=1          ; Downclock from 200MHz to 150MHz
POWERSAVEMODE=2        ; Aggressive power saving
THERMALTHROTTLE=1      ; Enable thermal throttling at 70°C

Yes, this reduces peak write speed from 150MB/s to ~110MB/s, but the drive will survive a 10GB file copy without thermal runaway. SM34x (especially SM3281) run hot during writes

  • Start: Click "Start (Space)". The tool will now:
  • Critical Note: You cannot use an SM32x MPTOOL for an SM34x controller. The firmware binaries and NAND databases are fundamentally different. Always download the specific tool version matching your controller. Yes, this reduces peak write speed from 150MB/s