I have an Alienware AW2721D and my M series Macs have no problem driving it at 240hz. macOS picks up that it’s a GSync display and supports VRR on it too.

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troupo 9 hours ago | parent [-]

I could never get my two ASUS displays work at anything but 60Hz

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cosmic_cheese 9 hours ago | parent [-]

My other setup has an ASUS PA278CGV as a secondary monitor and the MBP hooked up to it drives it at 144hz no problem.

Make sure your dock, dongle, and/or cables aren’t bottlenecks.

	▲	troupo 8 hours ago \| parent [-]
		> Make sure your dock, dongle, and/or cables aren’t bottlenecks. I've switched docks, dongles, cables, to no avail. Support also varies a lot between M chips, and Thunderbolt often doesn't support high refresh rates https://support.apple.com/en-us/101571 I can't remember now the actual setup I had, sadly