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Unable to set display to native resolution 2560 x 1600 (Nvidia Quadro NVS 420 & Samsung 305TPlus 30" Monitor)

Hi experts,

I am having problems setting the resolution to the native resolution of the monitor (Samsung SyncMaster 305TPlus). The monitor supports two native resolutions according to the technical specifications on the Samsung website, both 1280 x 800 & 2560 x 1600 using a Dual Link DVI-D cable. In the Windows display properties the maximum resolution offered is 2048 x 1536. If I use the Nvidia control panel and add a custom resolution of 2560 x 1600, the resolution works but does not fit the monitor properly and the mouse scrolls horizontally/vertically.

Here are the facts...
- PC is a Dell Optiplex 780.
- OS is Windows XP Professional (SP3)
- Using an Nvidia Quadro NVS 420 graphics card. This card supports 4 monitors at 2560 x 1600 according to the Nvidia technical specs.
- Using the latest Nvidia WHQL driver (197.90).
- Using a DVI-D (Dual Link) cable with all pins (as depicted in the attached screenshot).
- The Nvidia control panel detects the monitor & it's native resolution, however when it is changed the resolution is too big for the screen and it scrolls when the mouse is moved to the corners.
- The display & graphics card are HDCP capable.
- The monitor driver in use at the moment is the default Plug & Play monitor. Samsung does not have a 205T driver available.

Screenshot of system with Quadro NVS 420 graphics card & Samsung 305T Plus monitor.
If anybody knows what needs to be done to get this to work, the help would be greatly appreciated. From what I have researched so far, everything is being done by the book and this should work.

Watch Question

The nvidia website advises the display sizes you require are only available:

** through VHDCI to Quad DisplayPort dongle
*** - 2560x1600 through DisplayPort, 1920x1200 through Single Link DVI-D

Are you using the 'displayport'?

Its also worth checking your refresh rates as these resolutions are only supported at specific refresh rates (try 60)


totallytonto hit the nail on the head.
I was using the dongle that ships with the video card that outputs 4 x DVI ports. In order for me to get this to work I would have to purchase the DisplayPort dongle to suite the video card, then purchase a DisplayPort to DVI-D converter to suite the monitor, without having any garuantee that this would work.
Much easier just to buy a new graphics card. Thanks for your help.