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Mac Pro graphic board

175 Views 2 Replies Latest reply: Aug 6, 2013 8:29 AM by Yarramalong RSS
Yarramalong Level 1 Level 1 (125 points)
Currently Being Moderated
Aug 6, 2013 5:24 AM

I try to connect three screens with a Mac Pro. One has a resolution of 1680 x 1050 (connected via Minidisplayport + VGA adapter). The second has a resolution of 1080i and is connected directly on the DVI-port of the computer. The third one has a resolution of 1920 x 1080.


If the third monitor is connected to the Minidisplayport with a VGA-adapter, all three are being served. If this monitor is connected to the same port thorugh a DVI-adapter, the second monitor disappears from the list of the monitors.


Question: Is this behaviour caused by the graphic board? If yes, could it help to use the HDMI port of the monitor and connect with a HDMI-cable and adapter?


Thanks for helping.

Mac Pro, OS X Mountain Lion (10.8.2), 10 GB


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