Samsung QN90C/QN90CD QLED Review (QN43QN90CAFXZA, QN43QN90CDFXZA, QN50QN90CAFXZA, QN50QN90CDFXZA, QN55QN90CAFXZA, QN55QN90CDFXZA, QN65QN90CAFXZA, QN65QN90CDFXZA, QN75QN90CAFXZA, QN75QN90CDFXZA, QN85QN90CAFXZA, QN85QN90CDFXZA)

Unfortunately, the backlight isn’t flicker-free, as Samsung uses pulse width modulation (PWM) to dim the backlight. The exact flicker frequency varies between picture modes and with certain settings. In ‘Movie’ mode, with the backlight set between ’48’ and the max of ’50’, the backlight flickers at 120Hz. However, it increases to 960Hz with a backlight setting below ’48’. The flicker frequency drops to 120Hz in the ‘Dynamic’ mode with a backlight above 25, in ‘Standard’ mode above 21, and in ‘Eco’ mode above 25. If you’re using it as a PC monitor, it flickers at 120Hz in both ‘Entertain’ and ‘Graphic’ modes and flickers at 960Hz in ‘Game’ mode below 48. Between 48-50, it’s flicker-free in ‘Game’ mode, and it always flickers at 960Hz with the variable refresh rate feature enabled in ‘Game’ mode from a PC.