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  1. #1
    New ROGer Array
    Join Date
    Aug 2018

    Resolution Problem PG27UQ / Black bars, only 98hz


    I recently upgraded my CPU + Mainboard to an i7 8700k / MSI Z370A pro and reinstalled Win10 on an empty SSD. Also I am using a GTX1080ti + Asus PG27UQ with DP.
    Before I could run everything fine, 10bit @98hz 4k or 144hz overclocked with HDR and also switch the desktop resolution to 1440p and run it at 120hz/144hz for PUBG windowed mode with HDR. All settings worked as they should.

    Now I can run my desktop at 4k / 144hz and everthing just fine.
    But if I switch the resolution, I can only choose 98hz for anything besides 2160p.
    If I manually set a resolution above 98hz I will get black bars even on desktop. This will also happen if I activate HDR @98hz 1440p.

    Before everything worked just fine, now I am stuck at 4k only???

    I already tried reinstalling drivers + Nvidia stuff. But I can't get it working again.
    Both windows and Nividia control panel settings won't work.

    My old mainboard was an Asus ROG Z270F.

    If I manually change the colour settings in Nvidia control panel to YCbCr422 / 8 bpc / limited output I can choose 120/144hz again, but Windows won't let me activate HDR to adjust brightness for SDR content.

    If I change to any other or windows standard colour format, I am stuck at 98hz again with black bars.

    DirectX diagnostic program says HDR is supported, WDDM 2.4 drivers are installed.
    However if I activate HDR it will flicker and activate half a second and then turns off again after flickering.
    Last edited by L33R0Y; 08-21-2018 at 06:23 PM.

  2. #2
    New ROGer Array
    Join Date
    Mar 2019

    did you find a solution to this problem? I'm having the same issue when i change windows resolutions..

  3. #3
    ROG Guru: Yellow Belt Array Legolas PC Specs
    Legolas PC Specs
    MotherboardMaximus X Hero Wifi AC
    ProcessorIntel Core i7 8600k oc 5Ghz
    Memory (part number)Samsung DDR4 16GB
    Graphics Card #1ASUS NVIDIA GTX 1080
    MonitorASUS MS246
    Storage #1Samsung MZVPV256
    Storage #2Samsung MZVPV256
    CPU CoolerCorsair H110I v2
    Power SupplyPC 1200W Turbo-Cool 1200
    Keyboard ASUS SK2045

    Join Date
    Nov 2015

    Are you still using DP?
    Did you try another DP cable? Did try reset the PG27UQ?

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