Intel HD Graphics and 5K x 3K Resolution
5K monitors (like the Dell UltraSharp UP2715K) used as an extended display of the Dell laptop displays a garbled or flicking screen. This happens if you try to configure the extended monitor to maximum resolution (5120 x 2880).
This occurs when using a TB16 and mini-DisplayPort (mDP) or full-size DisplayPort (DP) cable connections.
This 5 K resolution issue is a design limitation of the computers switchable graphics video (Intel HD graphics, AMD, or Nvidia Discrete) configuration.
The Intel graphics driver cannot synchronize an extended output signal through a separate DisplayPort Multi-Stream Transport (MST) path and is unable to support 5 K mode.
Affected computers include:
There are two workaround methods to display 5K resolution on the UP2715K monitor when connected to a TB16.