The following steps will help you to overclock the Athlon, Phenom and Sempron processors:
- Set BIOS settings which are optimal for your operating system. Turn off the “Cool’n’Quiet” and “Spread Spectrum” technologies.
- Decrease the frequency of operating memory. Perhaps, you will have to cancel the installation of memory parameters with the help of SPD (“Memory Timing by SPD” parameter or similar to it), and then specify the minimum value in the “Memory Frequency for” parameter or similar to it.
- Decrease a frequency of the HyperTransport bus in 1-2 steps with the help of the “HT Frequency” parameter or similar to it. For example, a nominal frequency for the Athlon 64 processors is 1000 MHz (multiplier 5) and you can decrease it up to 600-800 MHz (multiplier 3 or 4). If your system has the parameter for setting of frequency for memory controller built in your processor, for example CPU/NB Frequency, its value has to be decreased too.
- Set fixed values of frequencies for PCI (33 MHz), PCI Express (100-110 MHz) and AGP (66 MHz) buses.
- Then you can start overclocking itself. Firstly, you can increase the basic frequency by 10-20% (for example, from 200 to 240 MHz) and then try to boot operating system and check its functioning. A setting parameter may be called CPU FSB Clock, CPU Overclock in MHz or similar to it.
- Check the real frequencies of your processor and memory with the help of CPU-Z utility. If checking of overclocked computer went without any fault, you can continue increasing the basic frequency by 5-10 MHz.
- If there is a fault, you can decrease the basic frequency to return your system in its normal mode and continue overclocking together with increasing og power supply core voltage. You have to change the power supply voltage smoothly and no more than to 0,2-0,3 W. When testing your computer with increased power supply voltage of your processor, pay attention to the processor temperature that should not be higher than 60 C.
- After finishing overclocking, set an optimal frequency of the HT bus, operating memory and its controller, provide testing of speed and productivity of overclocked computer. To decrease the processor heating, turn on the “Cool’n’Quiet” technology and check an operating stability in this mode.