BIOS screen can adjust selected CPU processor speed

clipped from www.proprofs.com CPU Operating Speed This setting allows you to directly choose the operating speed of your processor. When this value is set, the BIOS will automatically set the “External Clock” and “Multiplier Factor” values for you, and locks them to restrict any changes. For example, setting this value to “166” will set the external clock to 66 MHz, and the multiplier to 2.5X. To manually control the external clock and multiplier factor values, you must set this parameter to “User Defined”.