1 Reply Latest reply on Mar 15, 2013 6:26 AM by cwicky

    Bad VSync in Eyefinity display



      We are using Radeon HD graphics since quite a while in our visual simulation application.


      When recently moving on the HD7770, we got an annoying problem wiht vsync.

      Our application runs with an Eyefinity horizontal 3 screens setting, and the vsync is not working properly on some screens.

      Our connections are as follow :

      • 1 screen to mini-display port, using an adaptative converter to DVI-D
      • 1 screen to DVI-D output
      • 1 screen to HDMI output

      When setting the preferred display in Catalyst to the display port output, vsync is ok on the display port but not on the 2 other outputs (tearing visible on screen)

      When setting the preferred display in Catalyst to either the DVI or HDMI output, vsync is ok on DVI and HDMI output, but the tearing happens on the display port.


      Is there a way to have a correct vsync on all 3 screens ?


      Please note that we use a significant volume of GPUs per year (500+), and if no solution can be found on this issue, we will most probably stop using AMD's GPUs.


      Thanks in advance,



      Our configuration details :

      Win7 64


      DX9 application

      Catalyst 13.1

      Eyefinity 3x1 (mini display port / DVI-D / HDMI)

        • Re: Bad VSync in Eyefinity display

          We are somewhat disappointed to get no answer on this subject...


          In the meantime, we tested with other AMD GPUs : the pb seems consistent all over the HD 7xxx series, but it was fine on HD 6xxx.


          We also tested with nVidia GPUs (GTX 6xx series) which don't have this issue, and connection is even simplier, so our current solution will be to move on to these GPUs...