Well 2.7 was stable at that voltage on small fft's for 9 hours straight, not bothering to do wise testing because I want to know why there is such a voltage jump, I just started it at 271x10 and am going to se the difference every 10 mhz.
Edit: I think the board may be at fault here. 2710 was perfect with the same voltages as 2700. 2720 boots with the same voltage, but one core fails prime in about 10 minutes. I bumped vcore up one notch to 1.2v and windows would not even boot. It's just extremely odd and I don't like it.
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