Beware a bad OC will damage your graphics card.
To unlock higher unofficial OC:
To use (properly) Install to your desired location. For simplicity, I will use C:\programs\MSI Afterburner. Yours may be different!
-Launch MSI Afterburner, then immediately close it!
-Navigate to the install directory, and locate MSIAfterburner.cfg (In my case for this guide, it will be C:\Programs Files\MSI Afterburner\MSIAfterburner.cfg), and open in notepad.
-Change these values
-"Enable Unofficial Overclocking" to 1 (Omitted on newer versions/combined with the EULA)
-"Unofficial Overclocking Mode" to 2
-Then copy and paste the line below to "Unofficial Overclocking EULA"
I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
-save and exit
-Re-launch MSI Afterburner Enjoy!
More headroom for OCing!