Why would you want to OC an already fast CPU? I have "played" with OC and can see absolutely no point with the faster chips,as the marginal increases available aren't worth risking frying an expensive item.
If you had something slower than a 2 ghz maybe overclocking is an idea to play with. But with the latest cpu's there is no point. Unless you have a lot of money.
This is purely because once you start raising the front side bus on the cpu. Temperatures will rise. This also causes greater voltages to be required.
Thus major cooling kits need to be utilised. If you go down the water cooling route your looking at £150 just to keep a cpu cool. You might as well just buy a faster cpu and use an air cooler from coolermaster of thermaltake.
GO to the bios, raise the fsb by between 3 - 5 mhz each time. Run 3dmark2001. If it doesn't crash, lock up , reboot, do it again. When it does lock up. go back to the last setting that worked.
Doing this will increase the power that goes to your AGP graphics card and ram as well. SO ideally you want amotherboard like a KT3 Ultra2 R (an amd board for an example, i use it) which allows you to independently set the voltages for the DRAM, AGP and CPU.
Also as you increase the Front side bus, "FSB", you may have to increase the cpu voltage to compenstae for the extra power it will be creating. Raise it by a small increment each time. Only do this if the pc starts crashing and you want to raise the fsb higher. Will give more stability.
Another way is to lower the clock multiplier. Then raise the fsb. It is just experimentation to find the best combination.
BUT, all this will require greater cooling. so be prepared to buy an excellent cooler.
Or just go and buy a better cpu. I have an xp2700. No need to overclock that bad boy.
I'm sorry I don't remember saying that I was planning to overclock anything? I was just looking for some articles to read on the subject so that I could make a more informed choice when building my new PC.