Sorry for the late response.
You can do this method i tried,provided with screenshots:
First open afterburner without overclocking or adding something like voltage (here is my GPU not overclocked :
http://imgur.com/zjhroe4 )
Then overclock or add as much voltage as you want (in your case 105%)(GPU Overclocked
http://imgur.com/IhLWEXm )
Finally change the afterburner skin,so it will reset the sliders on default but the settings will be the same (skin changed
http://imgur.com/iLUtomD look IT IS overclocked )
Hope this works,tell us how its going
Best regards