Doffie Rotter <doffie.rotter at uconn.edu> > Oops--sorry to have to respond to my own post, but it needs amendment. > Last night I was playing Civilization III and I heard the fan go on. > Very quiet though, somewhat quieter than the one in my TiBook 800 which > goes on, I believe, both sooner and more frequently. I'm hoping this > means that the switch to aluminum was a good idea. Yes, as you noticed, these do have a fan; it's pretty much right in the rear center of the computer. If you're wondering about thermal conductivity, Aluminum is about 10 times more conductive than Titanium. That's good in some sense; the heat is getting away from the processor and other hot components more easily. It's also bad; the heat is getting to your hands more easily because of this. FWIW, I found a few values for the thermal conductivity of plastic, and they were about the same or slightly more conductive than titanium. Kynan Shook kshook at mac.com http://homepage.mac.com/kshook/index.html