Custom Resolution Utility (CRU)

[jobosho]

So, I am trying to change the frequency of a 1080p tv monitor, but every time I go over the standard 60hz, the resolution changes from 1920 to 960 x 1080. The frequency mod takes effect, but the image is stretched weirdly, so it is not usable. I also tried 1600 x 900, but I still got the stretched resolution as before. My system is using a really old gpu, (the Geforce 8800 gts I think) so could this be the cause of the problem?