New
#11
I wish I had an answer for you. I was having this trouble with an NVIDIA GeForce 6 series card (I forgot which one exactly). took my computer to CompUSA where I bought the card and they could not solve the problem. I had tried various drivers including a beta driver. The techs could not find the problem either. In the end, they credited me with the amount I paid for the card and I installed a GeForce 7600. My problem disappeared.
I will be interested to learn what the solution to your problem is. You have a better card than my new one is.