It seems from what I am reading that you need to underclock or overclock the memory timings on the card. From what I read either way works, but the default 750 does not work right.
Having the same issue I have an EVGA 7900 and a Samsung 22" LCD. I have had the same issue, I just installed the latest driver from Nvidia and it does not change anything. I have had the issue when trying to open a photo, when trying to set a screensaver and when trying to open a program that...