Dell P2714H Monitor - Manual (Page 44)

OSD Warning Messages
When the monitor does not support a particular resolution mode you will
see the following message:
Dell P2714H
The current input timing is not supported by the monitor display. Please
change your input timing to 1920x1080, 60Hz or any other monitor
listed timing as per the monitor specifications.
This means that the monitor cannot synchronize with the signal that
it is receiving from the computer. See Monitor Specifications for the
horizontal and vertical frequency ranges addressable by this monitor.
Recommended mode is 1920 x 1080.
You will see the following message before the DDC/CI function is
disabled.
Dell P2714H
The function of adjusting display setting using PC application will be
disabled.
Do you wish to disable DDC/CI function?
No
Yes
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Operating the Monitor