Why? I had Beta 5 installed, which actually allowed me tweak the voltage on my reference Sapphire HD 6870. I never installed Sapphire's Trixx because Afterburner worked fine. guru3d used to host the beta 5, but now links to Beta 6 all the time. I can't find it anywhere :/ Also, why would Beta 5 allow Voltage control, and not Beta 6?