First of all use offset voltage instead of fixed. Set Load-Line Calibration to level 5 and offset for eg. to +0.030V.
Set VTT to 0.986V, VCCSA to 0,925V and CPU PLL to 1,709V. These are Intel recommended.
Also turn ON SpeedStep, Internal PLL Overvoltage and Power Saving Mode.


Let me know if it helped.