I have two r9 to 280x crossfire and three monitors. I have two monitors connected through mini display port to display port to HDMI adapter and the other one connected through only HDMI to the primary card. In catalyst control Center I have crossfirex enabled. On the second graphics card I have my third display connected straight to the HDMI port on the secondary card. Catalyst control Center will not detect the third monitor as even being there but windows will detect it. How can I get all three to work together?