While many people shop for laptops and desktop computers and compare the Clock Speed of the processor, there are actually four (or more) factors to consider when comparing processors:

• Architecture - basic manufacturer and chip family specific design features
  
  
• Clock Speed - the speed at which the processor runs, (measured in hertz, e.g. - Mhz or Ghz)
  
  
• Cache - dynamic memory space for frequently or recently accessed data
  
  
• Front Side Bus (FSB) - the speed of data available to other components of the computer.
  
  

Other factors to consider can range from voltage for laptop processors, (standard, low-voltage, and ultra-low-voltage), to dual-processor versus dual-core-processor and other considerations for high speed servers, workstations and fast desktops systems.

Detailed information about Intel Processors can be found of the Intel website.