Thank you for posting and we apologize for the inconvenience.
I think there is an issue with the display timings on the HDTV. Can you detail us the Samsung HDTV model you are using?
Have checked if the card has the same issue by using a standard computer display?
If you do have a computer display, I suggest to use it along with the HDTV so you can check on the display settings by using the Catalyst Control Center.