Asus Striker II extreme 790i Ultra. When I've got Loadline Calibration Enabled in Bios, it does eliminate Vdroop, so when I specify 1.4875 in bios, then with older cpu-z it reports 1.49. But with the newer cpu-z it reports 1.58. Even when loadline calibration is disabled.
I'm afraid to clock it again incase I actually kill it. I think it was temperature related though.
It is very hard to kill a Q6600 (infact I have not herd of anyone killing one...) I have seen people running 1.7v+ at high temperatures... and myself have run 1.65v+ for suiside runs at 4.3ghz+
I believe Jonny Bravo ran at 2v+ (on LN2 Mind) for his Q6600 WR