Your graphics card and monitor need to support the connection you choose. There's no point buying a fancy DisplayPort cable if your monitor only has HDMI ports. Second, don't skimp on cable quality.

The M4 Pro version of the Mac mini that Apple introduced today uses the latest Thunderbolt 5 technology with transfer speeds ...

DisplayPort and HDMI offer similar benefits depending on the version, but DisplayPort is typically preferable for PC monitors ...