2560 x 1600 screen resolution not available when a second monitor is attached.

Posted by sgmoore on Super User See other posts from Super User or by sgmoore
Published on 2011-06-25T13:23:13Z Indexed on 2011/06/25 16:24 UTC
Read the original article Hit count: 260

Filed under:

windows-7

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64-bit

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nvidia

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screen-resolution

I am running Windows 7 (64-bit edition) and have a 30" Dell 3007WFP monitor which runs at a screen resolution of 2560 x 1600. This works perfectly until I try to connect a second monitor, and then the screen resolution on the main monitor immediately drops to 1280x800 and I can't change it back up to the correct resolution until I disconnect the second monitor.

The graphics card is a Nvidia Quadro FX 370. This has a dual link DVI connector (to which the 30" is connected) and a single link DVI connector.

The second monitor can run at 1920x1080 and is connected using a VGA to DVI connector. Note, it does not seem to matter whether the second monitor is running at 1920x1080 or even at 800x600.

Windows reports

Total Available Graphics Memory: 3839MB
Dedicated Video Memory:           256MB
System Video Memory:                0MB
Shared System Memory:            3583MB

Does anyone know if this a limitation with the video card, memory, drivers, connectors or something else?

If this is a limitation with the video card, can anyone recommend a PCI Express 16 card that would support at least this setup, but preferably support two 30" monitors both running 2560 x 1600. (I'm not into gaming etc, so it doesn't need to be very powerful)

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