With all default voltages I was able to hit 4.4GHz at 1.3Vcore...

I then increased the Vcore to 1.4V and was able to hit 4.7GHz at an impressive 1334MHz FSB.

I then lowered the FSB and raised the multiplier to 15 and was able to get 4.8GHz out of the processor.

Not bad and I think it still might have some extra room left in it.