Editing Front-side bus (section)

===CPU===

The [[frequency]] at which a processor (CPU) operates is determined by applying a clock multiplier to the front-side bus (FSB) speed in some cases. For example, a processor running at 3200 [[Megahertz|MHz]] might be using a 400&nbsp;MHz FSB. This means there is an internal [[CPU multiplier|clock multiplier]] setting (also called bus/core ratio) of 8. That is, the CPU is set to run at 8 times the frequency of the front-side bus: 400&nbsp;MHz × 8 = 3200&nbsp;MHz. Different CPU speeds are achieved by varying either the FSB frequency or the CPU multiplier, this is referred to as [[overclocking]] or [[underclocking]].