Hello! In this post I would like to ask a question on the topic "how to overclock an imac monitor". I have a 2019 imac with a radeon 580x. I tried to find a solution myself for a long time, but all I could was to add a frequency of 75 hertz in the "Monitor control" using third-party drivers on the video card, when this frequency is applied, the monitor turns off and turns on only when the settings are reset. I think this is some kind of hardware limitation.