Dell D3100 Dual 1440p Monitors

[rboerner]

Originally Posted by conorlap

Hi thanks for your comment. Yeah I'd seen that, but it states the maximum resolution is 2048x1152 only when two HDMI outputs are connected. The way I've got it setup is 1 monitor is connected via Displayport and the other monitor is connected via HDMI.

The Dell table states that the HDMI outputs can output to a single display at 2560x1440 resolution, but at a maximum 50Hz refresh rate (which is lower than the typical 60Hz).

Looking at page 18 (printed page 8) of the manual for your display (https://www.acer.com/ac/en/US/conten...oduct/5218?b=1) , there is no EDID timing for 2560x1440@50Hz, but rather only support for 2560x1440@60Hz (screenshot attached).

The absence of this timing mode is most likely why the display is dropping down to a lower resolution.