How to overclock Intel CPUs?

Step 3 Changing the values

Ok then! Lets get OCing. First of all, you want to increase your bus speed which is at 100MHz - 400MHz. Note that this value, multiplied with the multiplier, equals your final CPU clock speed in MHz. So in the case of my dual-core E2160, the default bus speed (200) multiplied by the multiplier (9x) equals 1800MHz or 1.8 GHz. So, get down to increasing the bus speed, make only minor increments at once, don't get over-confident or impatient, this is what results in accidents. Increase the value by 5 at maximum at one time. Then save changes and exit the BIOS. Next, see if your Windows boots or not, if it fails to boot or restarts automatically during or after the boot process, it means you've gone too far. Re-enter the BIOS and step the CPU back down.
If it goes strong however, do some benchmarking of your system using something like SuperPI, and to be 100% sure, run some games for a while. If it remains stable, head beck into the BIOS and step the CPU up again, repeat this process until your you experience instability.