Bandwidth for Two Displays

Two high-resolution screens eat throughput, and a thin link forces the refresh rate down.

HDMI and DisplayPort Both

Mixed monitors on a desk rarely share one input type, especially older panels.

Independent Screen Output

Extending rather than mirroring is what makes a second panel actually useful.

High Refresh Rate Support

Motion looks smeared when a dock caps a fast panel at a lower refresh rate.

Stable Display Wake-Up

Screens that fail to return after sleep turn a dock into a daily annoyance.