That voltage seems to high for it to be 24/7 usable.

If it only goes to 1.37 volts or so before it's unsafe like intel's 45nm cpu's overclocking could not be nearly as good as we thought.

Though 4.0 out of a 2.3 is a very impressive overclock. Normally wouldn't a faster one be able to overclock more at less volts?

Which would mean 3.0 deneb may get really good overclocks.