Quote from the article:
“No one wants their computer to be loud, but in order to keep components running at safe temperatures, cooling fans can wind up making the system sound like a blow dryer. In a busy office environment some noise may go unnoticed, but as computers find their way into more rooms of the home, near silence is essential. A computer sitting in the living room for use with a home theater system has to be quiet so that it doesn’t interfere with the enjoyment of music or movies, for example.
Complete systems and high end components are available to combat computer noise, but this Tip will look at a few areas to quiet existing systems on a minimal budget.”