> >> My cube sounds as if it has a fan(?) that is >> about to die. It is making a loud but uneven >> whirring noise. Like when you take your foot on >> and off of the gas pedal of a car. It doesn't >> seem to be affecting performance but the part is >> definitely about to quit working. >> Sounds to me like your HD is about to go. (Unless you have a cube with a graphics card that actually HAS a fan, the Cube is fanless). I had this happen and the early warning sign was a noise as you described it. The Cube HD is relatively easy to replace and there are instructions and a video clip on Apple's website. Sorry that I don't have the URL.