Here is a quick way to find out if your Monitor/HDTV supports Full RGB Mode (0-255). Set it to Full RGB Mode (0-255) in NVIDIA Control Panel obviously. Look at this picture: fullrgb_test.jpg You should be able to distinguish all 28 squares of the image. If you can see them all perfectly then you are good to go. If not and almost all the top squares look black, then go to your HDTV Picture settings and look for "Black Level". There should be 2 options there. Low & Normal. Set it to Normal. Now check the 28 squares again. They should all be distinguishable now. If you don't have Black Level option on your HDTV and your blacks are all wrong and picture looks over-saturated then you are out of luck and your HDTV probably supports only Limited RGB Mode (16-235). So go back to that mode. P.S. You need the 347.09 driver or latter for the RGB options to appear.