I have a 60 Gig and an 80 Gig in my Quicksilver/933 and I get no vibration at all and the fan noise is noticeable and louder than my 9600/G4 450, it isn't that all that distracting. Tom The noise stops periodically but it always comes back. Does the > newer machines have the same kind of problems with multiple drives. It > would not be easy on the ears for me if i put in another 2 hard > drives... >