Hey, sorry for bringing up a dead thread but I found a setting that people should try out if they have problems with PWM. Setting the monitor brightness to 100 stops the PWM, but the white luminance on a default splendid destroys my eyes.
Splendid: Game Mode
Brightness: 100
Contrast: 100
Color Temp: R - 75 G - 75 B- 75
Everything else at the default game splendid settings