I've had this monitor since yesterday and it flickers a lot in dark pictures, which gives me a headache. Do I need to change any settings to avoid this?
It would be possible to operate the monitor e.g. with Windows at 60Hz or higher, perhaps the setting is still set to 30 Hz? If, for example, Windows only recognises the screen at 30 Hz, then it would probably be due to the cable used or the PC or notebook, there are CPUs with onboard graphics that can only reproduce such high resolutions or even higher (e.g. 4K UHD) via HDMI 1.4 at 30 Hz. In this case, the DisplayPort connection would help, because it also has a higher refresh rate at higher resolutions.