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3. CPU Hacks > 27. Set the CPU Multiplier

Set the CPU Multiplier

Changing the CPU’s clock multiplier values can dramatically boost its performance without affecting other components.

The general nature of this hack applies only to AMD CPUs, all of which support multiplier value changes. Intel CPUs, with the exception of many Celerons, do not usually provide a means to change or even allow changing the CPU speed multiplier. Your system board must support the ability to change the processor clock multiplier value (the number the FSB or main clock speed is multiplied by within the CPU to arrive at the true operating speed).

The ability to change the multiplier value has significant merit in overclocking a system. First, it affects only the CPU, so neither the FSB nor the I/O bus clock values change. Second, it allows greater flexibility in altering the CPU speed; a small change of the multiplier value yields big changes in CPU clocking.


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