veetguitar, read here: http://en.wikipedia.org/wiki/Overclocking
If you search the net, there are countless recipes on how to overclock various CPU + motherboards combos.
Personally, I overclocked my Q6600 2.4 Ghz recently to see what it could handle.
It ended up at 3.5 GHz.
Measured with CPU Mark (http://www.cpubenchmark.net/), this lead to a 43% increase in CPU performance.
In the end I decided to return to 2.4 GHz however.
My system's CPU-fan and chassis-fan had to operate at a higher rpm to handle the increased heat from the CPU, which got too noisy for me.
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If you're going to experiment with overclocking, make sure you carefully monitor the temperature of your system.
I use CPU-Z, SpeedFan and Core Temp for this.
Henrik