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My 4K monitor was stuck at 60Hz until I learned which port (and which cable) actually carries 144Hz

Your monitor isn't lying to you — you just plugged it into the wrong port.

HDMI 2.1 vs USB-C vs DisplayPort: Which connection is better for your monitor?

C, and you'll often find a USB-C port labeled as a video-out port on laptops, too. While having several connection options is ...