"The first leaks were that the Phenom II could hit 4 GHz on air
cooling alone, though we obviously wonder how extreme that air cooling is.
Well today AMD had some actual demonstrations at their gathering, and the
Phenom II was able to hit 5 GHz at 1.6v by using dry ice cooling. Dry ice
is CO2, and it goes directly from solid to gas (sublimation) at a
temperature of -109.3 F (-78.5C for the rest of the world) at 1 atmosphere.
So with some pretty extreme cooling (non-LN) the Phenom II does show that it
has some legs in the clock speed department."