I just had to change my video cable and used a hdmi cable to connect my monitor. Since doing so the video does not fit on the screen, all sides are cut off so that the task bar is not even visible. I know that there are supposed to be scaling options in the control center but the slider is disabled and I cannot change it. I have tried several versions of the catalyst control software. I also have windows 8 installed.
My monitor does not have any overscan options that I am aware of and had worked previously with an nvidia card and windows 7 using the same hdmi cable.