4 Replies Latest reply on Jun 2, 2016 6:01 AM by macha

    AMD R9 280X on mac : 4 displays simultaneously not working




      I have an AMD R9 280X in my mac pro running OS10.9.5 ( mavericks )

      Strangely only two displays work simultaneously. All ports work fine but only a combination of two.

      ( DVI plus HDMI  , two minidisplayports , DVI plus one minidisplayport , One minidisplay plus HDMI. )

      What am I overlooking? In the description it says the and R9 280x should work with all displays simultaneously.


      hope there is someone who can help me solve this.


      thnx Jane