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

Question asked by macha on Jun 1, 2016
Latest reply on Jun 2, 2016 by macha



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