Overvolt with powertune?

Basically I want to add more voltage to my 6950 while having powertune at +20%. Otherwise my clocks will fluctuate meaning my overclock is useless. I have tried modifying the bios with RBE but I get a bsod in windows. Even if I uninstall my ati drivers, once I reinstall them and restart I get a bsod. MSI afterburner does not have a powertune setting so I can't use that. Any help would be appreciated. My card is an MSI R6950 twin frozr ii.

I fixed the issue. By using Sapphire Trixx I can set power control to +20% in CCC without it messing with it, unlike Afterburner.

I had the same issue with RBE and BSODs on an unlocked MSI 6950, but kept trying and eventually changed only one thing at a time(Mv) and it stuck and no BSODs. Then I went back in and changed the fan ramps later and all is well. Sadly the card only seems to want to do 920 w/o artifacts, but hey it's fast and it was cheap.

That's interesting, I may try that for voltage but for now I'll stick to overclocking with trixx as it seems to work.

TimoneX said:

I had the same issue with RBE and BSODs on an unlocked MSI 6950, but kept trying and eventually changed only one thing at a time(Mv) and it stuck and no BSODs. Then I went back in and changed the fan ramps later and all is well. Sadly the card only seems to want to do 920 w/o artifacts, but hey it's fast and it was cheap.

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I can't seem to do this. Just changing the volts cause a BSOD on startup.