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My video card is a ATI 1900xtx. It has 2 DVI ports on it and I have two monitors, a Dell and Gateway. I am running the 10.4.8 JAS.

 

If I have the Dell plugged into the right port and the gateway to the left it will only display on the gateway but it shows as a dell monitor in the display settings and I can only use a few resolutions.

 

If I have the gateway plugged into the right port and the Dell to the left it will only display on the dell but it shows as a gateway monitor in the display settings.

 

If I only have mone monitor plugged it nothing displays at all.

 

What I want is to display on the gateway monitor using a resolution of 1920x1200. How can I get it to display a resolution that is not in the list in the display preferences?

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I think you are missing my point. I don't need to use dual displays at all. The problem is that it thinks the monitor I am using is the other monitor that is plugged into my card but not being used. No matter how I switch the cables.

 

So I am using my gateway now but it thinks it's my dell, which is turned off. And I cannot get the resolution to 1920x1200 which my gateway supports but my dell does not.

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