Well there are two ways to overclock your CPU: increase the FSB or increase the multiplier.
It is best to first start increasing the FSB because that also increases memory speeds. Just increase it a couple of MHz a time and check for stability and temps. If everything is running fine continue increasing and otherwise back off a couple of MHz. A good program to test memory stability is Memtest86 which you can find here: <A HREF="http://www.memtest86.com" target="_new">http://www.memtest86.com</A>. Continue increasing and testing until memory errors are starting to pop-up... at that point you can either lower the FSB a little to the last stable point or increase the Vdimm (memory voltage) 0.1V to see if that makes the memory stable again. It is best to not go above the 2.7-8V
As soon as you found the maximum stable FSB and the CPU is still running cool and stable you can continue increasing the multiplier one step at the time until you reach the CPUs max speed. A great program to test CPU stability is Prime95. If your CPU runs unstable at a higher speed but still runs cool you can increase the VCore 0.05V at a time to see if that helps, but keep in mind that a higher VCore also means a higher temp. This VCore increasing trick can also be done when your PC refuses to boot-up with a higher FSB setting.
Good luck, and remember to do it slowly and to always watch your temps.
My dual-PSU PC is so powerfull that the neighbourhood dims when I turn it on
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