The bios flash trick does not work with these boards. But there is a way to get voltage from 1.3 to 2.3. I have these settings on my BM6 right now, but with a C 300A @ 474. The answer is to revert back to the original bios. But will my C2 work with the original bios you ask? I don't know. However, I have not read anyone saying they have tried this and it will not work. If it does not work with the original bios (BM6), it probably would be due to the inability of that bios to auto detect the high CPU multiplier.