Tearing on secondary display when cloning displays

Discussion in 'Video Cards' started by GoldenOne, Nov 6, 2018.

  1. GoldenOne

    GoldenOne n00b

    Nov 2, 2018
    So I've been trying to sort this for a while now.

    I have two displays, an acer x34P and an elgato 4k60 pro capture card.
    the x34p connected via displayport and the 4k60 pro via hdmi 2.0. (I have a dual-PC setup and am not using passthrough)

    When I "Clone" the displays, the display that is set to be the "clone source" looks perfect. But the cloned display has a stationary tear as shown here: https://clips.twitch.tv/AwkwardDelightfulPeanutYouDontSay

    This occurs regardless of resolution or framerate.

    I have my capture card and monitor both set to a resolution of 2960x1440 @120hz (the capture card supports this resolution, no scaling etc involved) and even though both are the same res, same refresh rate the tearing still occurs.
    I thought it was a capture card issue, but as mentioned, setting the capture card as the "source" display means it starts working perfectly, and the monitor starts tearing.

    -Gsync is disabled
    -Timings are EXACTLY 120.000hz vertical and 180.000khz horizontal on both displays.

    Is this just a driver issue? Is there any way at all to fix it? Something I can change in my capture card's EDID or in nvidia profile inspector etc?
    I am on the latest drivers

    It seems others have had a similar problem to me: