The monitor has 100% brightness and 75% contrast by default. I lowered both to 23% to achieve a 100nit white. Darks are reproduced correctly through the entire range of settings. Lights merge into white at a contrast level of 90% or higher. Color gradients are displayed with slight banding. The brightness is regulated by means of backlight modulation at a frequency of 331Hz.
The white brightness is quite uniform: an average deflection of 4.5% with a maximum of 14.4%. It is worse on black (an average of 4.7% with a maximum of 18.5%) but mostly due to the darker bands along the sides of the screen.
The gamma curves are good at the default settings even though differ somewhat from each other. Let’s see what effect the gamma option can provoke (gamma mode 1 is selected by default).
It’s clear that the value of gamma is somewhat reduced in Mode 2 and increased in Mode 3. What is important, the three curves all retain their shape and relative position.
At the reduced settings the curves nearly coincide with each other but have a lower value of gamma than necessary. The image is whitish and low-contrast as the consequence. You can choose Mode 3 in the monitor’s menu and get nearly ideal curves without using a calibrator.