Setting an FSB speed is related directly to the speed grade of memory a system must use. The memory bus connects the northbridge and RAM, just as the front-side bus connects the CPU and northbridge. Often, these two buses must operate at the same frequency.
Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second. In this case, there is 1 cycle per 2 seconds. So the frequency is 1 cycles/2 s = 0.5 Hz. 6.
Frequency and pitch. In the physics of sound, frequency is defined as the number of cycles, or complete waveforms, that occur within the period of 1 second. A complete cycle is defined as one compression and rarefaction cycle. The number of cycles within a second can also be given a musical value that is called a pitch.