Question about ASUS Mg279q

I have this screen and two more. Each at its own frequency at the same time. No problem with an AMD graphics card.

Note that this monitor is now a bit dated (2015 model) and I believe there are very good alternatives on the market. I don't have a specific recommendation though.

I am also very happy with this screen, the picture is superb and it works perfectly. Unfortunately I can't answer this technical question because I only use one monitor as well. It must depend on the graphics card. I guess you have to go and adjust the settings for each screen. Otherwise the screen itself is really good.

I am very happy with this screen. I can't answer your question precisely because I use it alone without another screen connected and I'm not qualified enough to tell you more technically.