I ran three monitors on an RTX 3060 on Linux before and it worked fine, 1080p 144hz, 1440p 144hz, and a 1080p 165hz. Worked fine on both KDE Plasma and Gnome, didn’t try any other desktop environments.
There is something with X11 where desktop compositing runs at the framerate of the lowest hz monitor that is active, but that doesn’t affect anything when the compositor is disabled like games, and on Wayland it doesn’t have the issue. It’s not particularly a big issue either since it’s just the desktop animations and stuff, and it’s very likely to go unnoticed at all unless you’re watching for it.
I ran three monitors on an RTX 3060 on Linux before and it worked fine, 1080p 144hz, 1440p 144hz, and a 1080p 165hz. Worked fine on both KDE Plasma and Gnome, didn’t try any other desktop environments.
There is something with X11 where desktop compositing runs at the framerate of the lowest hz monitor that is active, but that doesn’t affect anything when the compositor is disabled like games, and on Wayland it doesn’t have the issue. It’s not particularly a big issue either since it’s just the desktop animations and stuff, and it’s very likely to go unnoticed at all unless you’re watching for it.