I just replaced my gaming system. I used to use two 8800GTX in SLI. I switched to a single 4870 on a new mb, etc. I'm using the same cables and monitor setup (DVI-HDMI). The monitor is a 42" Toshiba Regza which supports resolutions upto 1920x1080 at 60Hz.
The problem is the desktop is not the correct size as displayed on the screen. First it is 5-10% smaller than the full screen and it is not 16:9. Other resolutions show similar behavior. The Nvidia based system does not have this problem.
This stuff is way above my pay grade and I was hoping someone out there had a little wisdom on the subject. If you can help but need more details please let me know.
Yes, that did solve the problem. Thanks for the advice.
The location of the control for controlling the over or under scan was the sticky spot. I didn't find any posts that referenced the location of that setting.
For those who are searching for the answer: in Catalyst 9.9 for Windows 7 and for Vista it is under Desktops & Displays. Click the inverted triangle in the icon for the monitor you wish to control and select configure. The scan features are under Scaling Options. Mine was set to 7% as default, 0% was the correct setting.