I have a 2018 Mac Mini with Dell U2720Q display. I use the USB-C cable that comes with the display, and when using this cable, I have to choose betweenHigh Resolution--4K @60Hz, but USB speed is 2.0 <--Current settingHigh Data Speed--USB speed is 3.1, but 4K @30HzI want 4K @60Hz _and_ USB 3.1 so that I can use the 4 USB ports on the display at full USB3 speed. Going through many discussion forums, I found that the DisplayPort capability needs to be 1.4 (HBR3), which my Mini has, and the link See full review