*This is how to fix the screen flicker issue when on desktop* Enable overdrive create a profile in CCC and save it, but do NOT activate c:users[user name]appdatalocalatiaceprofiles [must have show hidden files on] open the .xml with the same name as the profile created make the following changes Feature name=”CoreClockTarget_0″ Property name=”Want_0″ value=”40000″ [previous should be "15700"] Feature name=”MemoryClockTarget_0″ Property name=”Want_0″ value=”90000″ [previous should be "30000"] Save and close file now by going in CCC and activating the profile the idle speeds should be 400 and 900 instead of 157 and 300 this will marginally increase idle temps
Read the original here:
Screen Flicker With ATI Cards Problem Fix! – Used on XFX 5870 Crossfire