If may also largely depend on your climatology. Bear with me here, but if you live in an area considered high desert or an unusally hot place, it would be entirely prudent for your fan to run as much as it does. If it is not affecting the performance of your machine, then it is probably necessary. In fact, it is probably offering more in the way of protection and for that, I surmise that we could all deal with a minor noise annoyance.