I have no experience with overclocking your graphics card, but you may be trying to overclock past CCC settings on MSI afterburner. When you try this, it will reset to stock no matter what. There are programs that can bypass that, or you could go into your MSI Afterburner folder in Program Files, and go to MSIAfterburner.cfg file and open it up with notepad. At the bottom, there should be an option called "Enableunofficialoverclocking = 0". Change the value to "1" so it would read "Enableunofficialoverclocking = 1", and save the file. This should allow you to overclock past CCC settings