Originally
posted by
JamesGreystone:
It is an AMD HD 3870, it has 2 outputs for video so it is capable of driving 2 monitors.
OK, so perhaps it thinks you actually do have 2 monitors, and that combined they are so wide that MA3 can't scroll.
Then when you "check off the "render same image on all monitors" setting", it works "properly".
There are many potential causes of a video card thinking the wrong things - settings, drivers, cables connected, etc. Make sure you have the latest drivers, and then look at settings. Perhaps someone else here has the same card and can advise.