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There are three main ways to over clock CPU: jumper settings, BIOS settings and through over clocking software. Hardware settings are commonly used.

1. Over clocking jumper settings

Most of the early use of the motherboard jumpers or DIP switches settings for over clocking. In these jumpers and DIP switches near the main board are often printed with a number of forms, records of the jumper and DIP switch is the definition of the functions of portfolio. In shutdown mode, in accordance with the form you can set the frequency. After rebooting, if the computer can start a normal and stable operation of the over clocking on that we have succeeded.

For example, the use of a 1.7GHz Celeron with the Intel 845D chipset motherboard, it uses way jumper over clocking. In the inductance coil of the following, we can see that the form of jumpers, when the jumper set to 1-2 for the manner of FSB 100MHz, and changed the manner of 2-3, to the FSB on 133MHz. The default Celeron 1.7GHz FSB is 100MHz, the FSB as long as we upgraded to 133MHz, the original Celeron 2.2GHz over clocked to 1.7GHz will work.

Another use of an AMD CPU with the VIA KT266 chipset motherboard, using the DIP switch settings to set the CPU multiplier. Most of AMD do not have the multiplier locked, so it can be carried out by modifying the frequency over clocking. This is a group of five DIP switches, through the serial number of the different switch-off state can be combined to form dozens of patterns. DIP switches in the top right of the note printed tables, the DIP switches in different combinations of the changes brought about by different frequencies.

For example, we have an AMD 1800 + for over clocking, first of all to know, Athlon XP 1800 + of frequency equal to 133MHz FSB frequency × 11.5. As long as we will be multiplier to 12.5, CPU frequency will become 133MHz × 12.5 ≈ 1.6GHz, equivalent to an Athlon XP 2000 +. If we raise the frequency to 13.5 hours, CPU frequency as a 1.8GHz, it will be Athlon XP 1800 + Over clocking become Athlon XP2200 +, a simple operation in exchange for a great performance upgrade.

2.BIOS settings

Mainstream motherboard now basically abandoned the jumper and DIP switch settings change the settings or CPU FSB frequency, but more convenient to use the BIOS settings.

Such as ABIT (Abita) and the Soft Menu III EPOX (EPOX) and so are the BIOS over clocking Power BIOS way, in the CPU parameters can be set on the CPU frequency, FSB settings. If you encounter problems after over clocking the computer can not start the situation and hold off as long as the INS or the HOME key, reboot the computer will automatically restore the CPU default working state, so in the BIOS over clocking better.

Here on ABIT NF7 motherboard and Athlon XP 1800 + CPU combination of programs to achieve the actual over clocking. Currently on the market the main brand BIOS there are two types of PHOENIX-Award BIOS, the other is the AMI BIOS, in Award BIOS as an example here.

First of all, restart your computer, press DEL key to enter the motherboard BIOS settings interface. From the BIOS to select Soft Menu III Setup, this is the ABIT motherboard over clocking features Soft Menu.

After entering the function, we can see that automatic identification system for 1800 + CPU. We have to enter here will be replaced by the default model to identify User Define (manual setting) mode. Set to manual mode, the original gray not optional CPU FSB and multiplier options now become a state.

If you need to use to upgrade the FSB over clocking, then in the External Clock: 133MHz enter here. There are a lot of adjustment for the FSB, you can put it to the frequency of 150MHz or higher option. FSB as a result of increased system bus frequency will affect the stability of the work of other equipment, so it must be used PCI frequency lock approach.

Multiplier Factor is a CPU frequency of the local regulation, enter into the Options area, based on the actual situation of CPU to select the frequency, for example, or higher frequency 12.5,13.5.

If the system was unable to start or job insecurity after over clocked CPU, there is a way that can raise the CPU core voltage to settle. Because the CPU over clocking, the power consumption also increases. If the supply current also remained unchanged, and some CPU power consumption due to lack of will not lead to stability. After the upgrade the voltage, CPU on the momentum gained more, so that it easier over clocking success and stability.

You can set CPU core voltage regulator in the BIOS. Under normal circumstances can choose Default (default) state. If the system unstable after CPU over clocking, you can add CPU core voltage. But the side effects of a large increase in voltage, CPU heat will be the first increase, followed by too high voltage can easily increase the burning of CPU, so when the voltage must be careful in general to 0.025V, 0.05V or 0.1V step upward increase in it.

3. Over clocking software
Set the frequency of shutdown or restart the computer after the recovery, if not dare to set up a hardware over clocking, you can use software over clocking over clocking test results. The most common software, including over clocking Soft FSB and the motherboard manufacturers to develop their own software. They are more or less the same principle, is by controlling the clock generator frequency to achieve the purpose of over clocking.

Soft FSB is a more generic software that can support dozens of clock generator. As long as used by the motherboard clock generator models to choose from, click on GET FSB access to  control clock generator, and then you can link through the frequency settings for over clocking, and after the press selected so that CPU can save by the frequency of the new settings to work. But the shortcomings of software over clocking is when you set the frequency so that CPU can not afford when you click Save in the moment of death or lead to system crashes.