Dude, seriusl you need to read up more.
The base clock is what sets the speed.
The multi is what the base clock is multiplied by to get the speed.
the i7 920 has a multiplier of 20.
Example:
(Base clock) * (multiplier)= The final speed.
So the stock settings would be:
(Base clock) * (multiplier)= 2.66
and as i have already said. the multipler for the i7 920 is 20 this gives us the following...
(Base clock) * (20)= 2.66
Simple alegebra dictates that the base clock must be 133 in this situation.
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So then obviously 150 base clock would give us 3.0 ghz because of the following.....
(Base clock) * (multiplier)= The final speed.
(Base clock) * (multiplier)= 3.0GHz
(Base clock) * (20)= 3.0GHz
(150) * (20)= 3.0GHz
Get it?