Verified by HW monitor and CPU-Z to be >1.6. Asrock's utility gave just under 1.6, but its not really accurate (and I didn't check the Asrock utility after I put it on load; I just killed Prime asap). The fact that the temps hit >80C in seconds is consistent with a Vcore much higher than 1.525 (what I was using before).
I honestly wouldn't mind running an extended prime on 1.6 (not 1.6x or whatever I was at before) if my ambient temps are 10C or lower, on air. Too bad my room temps are about 15C higher than that. There is decent evidence that SBs can take a crapton of voltage, and the fact is, people run phase and stuff at 1.5-1.6V 24/7 without problems. Controlled temps and you *may* fine. Its debatable whether the combination of both high vcore and high (but not 100C high) temps can kill a CPU. All I can say is that high vcore alone isn't really that dangerous... as long as your motherboard and PSU are up to par.
Edited by Kanashimu - 2/11/13 at 5:02am