One bit of advice for overclocking that can't be said often enough: monitor your temperatures (use something like hwinfo). Make sure you stay well within operating temps. Stock coolers are pretty good but may not be up to aggressive overclocking.
You may very well find that with a fast CPU, you won't be able to max out the CPU even at standard clock rates.
You may very well find that with a fast CPU, you won't be able to max out the CPU even at standard clock rates.