http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx <--- CAP1 Download
Uninstall any other CAP installed and install the newest one, then create (or modify) a profile for Crysis2.exe, choosing F.E.A.R. as CrossfireX compatibility profile. Doing that will fix the flickering seem on Crossfire systems and will improve performance as well!