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I got a Samsung NP900X3A Ultrabook ( with Intel® HD Graphics 3000 and an external Samsung SyncMaster SA450 24" screen. I plug the external screen into the micro HDMI with a VGA adapter. My problem is, that I can only set up the screen to run with 1440x900 resolution. I installed drivers etc. but no change. Is there anything I can do to get the full resolution the screen is capable of? Do I need to buy a HDMI to Micro HDMI cable?

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You will need to use an HDMI cable more then likely to get any higher resolution. Have you verified your Ultrabook even supports a higher resolution then 1440x900? – Ramhound Nov 19 '12 at 12:57
The ultrabook itself has a 1366x768 screen. But I've seen x1024 resolutions as well. – uwe Nov 19 '12 at 13:00
up vote 0 down vote accepted

Ramhound was right. The Micro HDMI to HDMI connector (from the MS Surface) fixed the issue with the resolution. I wonder why samsung doesnt offer such a connector.

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