I just got an 867 Dual processor G4 and fired it up yesterday for the first time. The fan is so loud that I cannot concentrate enough to work. I think it must have a defective fan, so my brand new Mac is now sitting in the repair bay at my local Mac shop waiting to be checked and hopefully repaired. The tech mentioned that these new machines are much louder than the older ones. Does anyone know how to muffle the noise in the dual processor machines?