Correct, Big Sur broke DisplayPort above a certain bandwidth, but only on Intel Macs as I understand it. https://discussions.apple.com/thread/252174979?page=1

Correct, Big Sur broke DisplayPort above a certain bandwidth, but only on Intel Macs as I understand it. https://discussions.apple.com/thread/252174979?page=1 https://discussions.apple.com/thread/252174979?page=1 https://egpu.io/forums/mac-setup/4k144hz-no-longer-available-after-upgrade-to-big-sur/ https://egpu.io/forums/mac-setup/4k144hz-no-longer-available... I have to use SwitchResX to define a custom resolution (95Hz), otherwise my gaming monitor won't go above a sad 60Hz. Meanwhile, Linux runs perfectly on the same setup all the way up to 160Hz. Yet another place where Linux has fundamentally better hardware support than Mac.