2560x1080 not working with Windows

[Rayzer_116]

Hi I have the LG 25UM57-P monitor and the XFX R9 390 GPU and in Windows 8.1 the 2560x1080 option doesn't even show up. What do I do?

 

[iam2thecrowe]

install the driver for your monitor?

 

[Rayzer_116]

install the driver for your monitor?

The LG website says I don't need one.

 

[ffg7]

but do they have a driver for your monitor & if they do then install it?