I unlocked ati overdrive when I had my older crossfired cards and just recently bought 2 new HD5770 GPUs and I express uninstalled ati drivers and reinstalled them for the 5000 series cards, but overdrive Is still unlocked? How do I set it back default and locked?
More aboutrelock overdrive
Reinstalling the driver always locks it for me
As long as both boxes (in Overdrive) are unchecked, the card will operate at default.