This is from the another forum and the credit is due to the OP.
In the Catalyst Control Center (CCC for short) inspect the following settings:
Right-click your desktop, and go to the Catalyst Control Center. Set it to advanced mode if it's not already.
- At the top left, click the "Graphics" menu, and then "Desktops & Displays".
- For your desired display, left click the little black triangle in the bottom part of the screen, on the LITTLE picture, not the BIG one, and click "Configure".
This part is very CRUCIAL. There is a little picture of a TINY TINY Monitor and TINY TINY Arrow at the FAR bottom LEFT of the CCC menu. It is this LITTLE ARROW that you left click on by the button that says "Basic..." and the button that says "OK" When you click on the little little llittle black arrow (not the Big Black Arrow in the middle of the CCC window you will get the option to click "Configure" Then the following will be available to you:
There will be 6 buttons at the top of the CCC
Attributes
Avivo Color
Scaling Options
HDTV Support
LCD Overdrive
Pixel Format
Under Attributes
- check the "Enable GPU scaling" box and select "Scale image to full panel size". Hit Apply.
Under Scaling Options
- There is a slider bar to set Underscan and Overscan. I set Overscan to 0% and everything was instantly perfect.
Click Apply