For anyone who might be interested:

Changing the config file in MSI Afterburner 2.1.0 b2 will allow you to take the CPU and Mem clocks much higher (1265/1495).
It still doesn't give voltage control though...

These changes work on my Sapphire 6870. It didn't really help for me, the best my card can do stable @ stock V's is 950/1150.

Go to the MSI Afterburner folder (should be in C:Users/username).
Open the file "MSIAfterburner.cfg" using notepad.
Edit the following 2 items:
unlockvoltagecontrol = 1
enableunofficialoverclocking = 1

Then use the "save as" option with File Type "All Files" and select Save.

This should let you run higher clocks than what CCC allows.

Hope this helps....... Dave