This isn't really the kind of card you would normally overclock, but we know that some people will try and squeeze a few extra frames from their system. We used Sapphire's excellent TriXX software as Catalyst Control Center only allows for limited overclocking with this particular card.
The overclock helped to increase frame rates by 3fps in Colin McRae 2. The overclock might be useful for those games running at borderline frame rates.