ROG SWIFT PG279Q issue

[Eichenstein]

Hi,
at first of all i want to say sry for my bad english

I have my ROG SWIFT PG279Q since 4 years or so, since last week i got an issue... when the monitor is connected via displayport 2560x1440 144hz there are stripes on the screen. i will show you with some pictures down below.
i tried a new dp-cable, same issue. my 2. monitor is working fine, so i don´t think its my 1080ti.
it gets less when i lower the refresh rate to 100hz as you see in the pictures below.

2560*1440 144hz:


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2560*1440 100hz:


while i´m gaming the issue also there with 100hz, i didn´t try below 100hz.

with hdmi 60hz i didn´t see the issue hapening.

maybe someone can help.

greez
Niko

[Eichenstein]

now it even got worse, i see the problem now whatever hz i set, displayport and hdmi same issue. 2. monitor still works perfectly fine...
and so you know, the pictures where made with my smartphone, you don´t see the issue on screenshots.