Overclocking of Intel Core 2 Processors. Part I

The Intel Core 2 processors family is one of the most successful one in the history of computer industry thanks to a high productivity, low heat and excellent overclockability. Starting from 2006, the Intel companyhas produced tens of processor models of this family under various trademarks: Core 2 Duo, Core 2 Quad, Pentium Dual-Core and even Celeron.

To overclock the Core 2 processors, you should increase the FSB frequency, the usual value of which may be 200,266, 33 or 400 MHz. You can find a precise value of the FSB frequency in your processor’s specification, but do not forget that the FSB frequency is given with a fourfold multiplication during data transmission. For example, a real value of the FSB frequency for the Core 2 Duo E6550 2,33 GHz (1333 MHz FSB) is 1333 : 4 = 333 MHz.

When the FSB frequency increases the frequencies of operating memory, chipset, PCI/PCIE buses and other components will increase automatically. So, before overclocking, you have to decrease them forcibly to find out the most operating frequency of the processor. When it will be known you can select optimal operating frequencies for other components.

The sequence of overclocking may be the following:

  1. Set the optimal BIOS settings for your system. Select the value “Disabled (Off)” for the Spread Spectrum parameter which is not completely compatible with overclocking. Such parameters may be several: for the processor (CPU), PCI Express bus, SATA interface and others.
  2. For the duration of overclocking, turn off energy-saving technologies Intel SpeedStep and C1 E Support. After finishing all experiments, you may turn on these functions again to decrease electricity consumption by your processor.