I will rip my older XFX DD 7950 bios later and put it up, that may fix this
Thank you. I'll send you 10 LTC for the help if it works! (Assuming you don't hate LTC

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I contacted XFX technical support about that. They say that the 2 DVI version is voltage locked (which is not true as overvolting works) but the 1 DVI version is not. Which one do you have?