DPCD

DisplayPort Configuration Data (DPCD) is a set of registers describing a DisplayPort connection's capabilities, configuration and status. These values describe the connection carrying the image. AMD’s DisplayPort guide describes these registers

This is different from EDID, which describes the display's identity and advertised image modes. The two sources answer different questions about the same display setup.

BetterDisplay can report DPCD-derived information when its communication path exposes it. Missing information does not mean the monitor lacks DisplayPort. An adapter or the current system connection may prevent the app from reading those registers.

See Individual Display Settings for the information shown by the app.