I've noticed recently that my CCC (12.4) keeps changing the settings in the performance tab. Mainly the over drive sub-sections, especially the CPU overdrive. At the moment I have both GPU and CPU overdrives enabled, neither are set to the maximum. With these settings everything works fine, never a BSOD or GPU crash. Right now in the performance tab there are 4 sub sections; graphics overdrive, cpu power, cpu overdrive and amd over drive. The when it changes, for no apparent reason, all that is showing is 2, graphics overdrive and cpu power.