I had a 19" HD TV hooked up to my computer, it was supposed to be able to do 1280 X 720 but I wasn't able to; I lowered it to like 1200ish X 600ish not sure exactly though. I figured that it was the TV as it was kinda cheap, but I just recently hooked up a 31.5" TV with 1280 X 720 and am having the same problem. However, I can't find a correct resolution. I have an EVGA GTX 660 SC and the newest drivers.
Thanks for any help.