*** Official HD6XXX Series Overclocking Thread ***

[Oztopher]

Note for those who use modded 6950 cards. Afterburner provides voltage control only on reference design 6950 cards with 100% original 6950 BIOS and 6970 cars with 100% original 6970 BIOS. Afterburner's voltage control WILL NOT function if 6970 BIOS is flashed on 6950, it is supposed to be that way and it won't change in future versions and any "bugreports" on it or demands to "fix" it will be ignored.

So does that mean we can't even use it on an unlocked 6950 BIOS? sucks

But wait, found this:

Yes, it is possible to override the database to make Afterburner voltage control working with 6950 flashed with 6970 BIOS. 6970 voltage calbiration info should be added to 6950 configuration file in this case:

VDDC_VT1556_Defaults = 9A 5C 9B 80