How to Overclock an Intel Duo CPU

A Core 2 Duo CPU, bottom side up.

Overclocking is a process used by computer enthusiasts to glean as much processing power as they can from their computer's processor. In short, overclocking involves the use of settings on the motherboard to make a slower processor run at the speeds of a faster and more expensive processor. Overclocking an Intel Core Duo or Core 2 Duo CPU (Central Processing Unit) is no different than overclocking any other CPU, and caries the same risks and benefits.

Instructions

1. Power up or reboot your PC. At the POST (Power On Self Test) screen, press the "Delete" key, or the key designated by the motherboard manufacturer, to enter the BIOS (Basic Input/Output System) setup screen. The necessary key is often stated in the POST display.

2. Enter the subscreen that involves the CPU settings. The name of the screen differs among manufacturers. Common names are "Advanced Settings" or "Advanced CPU Settings."

3. Locate the entry for the CPU FSB (Front Side Bus). Take note of the stock FSB setting. If it is not shown in the BIOS screen, then it should be listed on the CPU box or in the computer's specifications. Increase the FSB setting of the CPU 15 MHz (megahertz) at a time. For example, if the CPU default FSB speed is 200 MHz, then set it to 215 MHz.

4. Save your BIOS settings and exit so that the PC reboots. If the computer can complete the POST and load into the operating system without issue, then reboot and increase the FSB another 15 MHz. Repeat these steps until either the operating system fails to load or the computer cannot POST or complete the POST. When any of these situations occur, re-enter the BIOS and reduce the FSB speed 5 MHz at a time until the system can boot up stably.

Tips & Warnings

• Have your motherboard manual and CPU box handy for reference when needing information on settings and where to find them.

• Overclocking is a potentially dangerous activity. An overclocked CPU can fail at any time. Overclocking a CPU voids its warranty, and may also void the warranty of the motherboard or any of the components connected to the motherboard.

• An overclocked CPU runs much hotter than a CPU running at normal speed. Be sure to provide adequate cooling to an overclocked CPU to preserve its lifetime.

References

• William Bellisle-Pio; Network Systems Administrator; Auburn, Washington