Hate to say it, but sounds like the problem is on your end.
I've got five Samsungs (I've had more) ranging for 15" to 24" that have never had issues.
When you install the NVidia drivers, did you check that little "HD Monitor" option without first checking to see if the monitor actually supports it? It does say it will damage monitors....
Oh, and Dell usually uses Samsung panels.

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