FRONT SIDE BUS

is the speed (measured in MHZ) of the bus between the Processor and RAM. As the front side bus increases, so does the rate data is moved from the CPU to Memory (Fetching and Storing). Common processors today offer front side bus speeds of: 100MHZ to 133MHZ. There are also front side bus speeds today that reached 200MHZ, 266MHZ and 400MHZ but they really are variations of 100 to 133MHZ, with more than one instruction going at a time.