They are optimizations for certain games. In addition, people with crossfire also get some crossfire fixes. If you play games you need them. They are a seperate download from the driver suite. The latest is 11.11 cap3. When a new CAP becomes available....uninstall the older one before installing the new.
Google is your friend: http://www.google.com/search?q=amd+cap&sourceid=ie7&rls=com.microsoft:en-us:IE-Address&ie=&oe=
Edit: There is also no 'on-off ' control...it recognizes the game. Nothing for you to do
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11:57 AM by