When I started noticing that the heatsink fan on my 500mhz Server was making noise, I needed to do something about it! It was making a noise as if the bearings were dying, but they just needed a little more lube. When your heatsink fan starts making loud noises, or seems a little bit stiff when you spin it (while it?s off), it?s probably a pretty good idea that you follow this short how-to to quiet it down a little and extend it?s life?