DisplayPort 2.1 uses four Ultra-High Bit Rate lanes and more efficient encoding to raise available bandwidth. Plugable explains that this supports higher resolution, refresh rate, and color-depth combinations than earlier connections could offer. The specification's maximum does not mean every cable can carry the same rate.

Its guide recommends VESA-certified cables identified by their DP40 or DP80 markings. Cable length also matters in the described configurations. Match the cable rating to the intended connection instead of choosing by connector shape alone, then verify the display and source support the desired mode.