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I have a Dell U2720Q monitor that accepts HDMI 2.0, DisplayPort 1.4 and USB-C. I use USB-C because the monitor acts as a hub for a range of peripherals (keyboard, mouse, webcam, speakers, etc.etc ...
The last one is the most significant as a four-link DisplayPort 2.1 setup, using UHBR20 signalling, can transmit a 4K frame at 240 Hz, without needing to use DSC (Display Stream Compression).