Flickering problem

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Joined
17 Feb 2014
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Monitor: LG 34UM95
GPU: Radeon HD 7870 x edition.

Can only Use HDMI, so will only get 50 hertz for now from this card.
Problem is though, at 3440x1440 res, the display seems fine, but the screen will flicker violently, and if a window is maximized its very unstable and will flicker. At 1080 it's better.
Weird thing is, when I add another screen to extend the display. at 3440x1440 & a 1080 together. The main will run perfectly.

But I don't wantto have to have an extra display running just to fix this.
I have the AMD drivers, and LG drivers I need.

Think the extra display is clicking some kind of setting in, but no idea what.

Any help wouuld be great.
 
When you connect the second screen are you duplicating or extending the screen?
I'm guessing the flickering is cause the screen is 60hz where as you're only providing 50hz.

Is 1080p @ 60hz stable?
 
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