AMD Overscan Correction Resulting in Video Acceleration Issues

To start, I have [this computer](http://www.overclock.net/lists/display/view/id/3869055) with an Acer P235H monitor.

Whenever I attach the monitor via HDMI, it automatically underscans. This is very annoying, and so I enter CCC to properly fill out the screen. For desktop and 'Modern' applications this solution works excellently.

Starting up games, however, causes significant problems. The games that launch in fullscreen mode create video corruption such that I cannot play those games. Some of the windowed fullscreens appear to work, but I haven't tried them all. To resolve this issue I setup a DVI connection; everything with this is fine.

I now want to add my old Dell monitor to help with workflow, but I only have DVI on that monitor and only one DVI spot on the GPU. The issue thus is, I need to hook the primary monitor via HDMI, but this prevents my gaming. The lack of a second monitor slows down my work pace (which in turn delays gaming).

Do you have any suggestions for resolving this issue? Alternatively, can you suggest an HDMI monitor, less that $500, that won't have this issue?