Hey, In a quiet room, you can hear the ibook whirring and a soft click, and it whirs again, and so on. It happens like every 2-3 seconds. It's not loud at all, but in a quiet room, it can get annoying. It sounds like the HD spinning, but I'm not sure. I have no upgrades except corsair 1GB ram. John
Sounds like the HD to me too. If that's what it is, I'm pretty sure you'll desensitize to it pretty quickly. There are *much* louder hd's out there. And the iBook fan doesn't run that much compared to a lot of notebooks.... But good luck!