I know it's the fans. I meant has anyone determined what part of the fan it actually is? It sounds to me like one of the fan blades has a slight imperfection, or a slightly extended blade, and its causing it to hit the sides.
My P.O.S. Win98SE PC makes this "moo" noise all the time. Until I tighten a screw. Maybe its a loose screw?
While I fully agree that the temps of the rev up/down need to be changed (come on at say 69º, go off when it's back down at 55º or so), and maybe even have the fan just goin at its slowest possible RPM all the time, as opposed to complete on/off cycles), I get the impression it was a bad batch of fans or something to that effect. I'd like to see someone actually determin the cause of the "moo", which to me sounds like a vibration or something to that effect.
Or maybe its the design of the fan. From that vid on YouTube, it doesn't look like a bladed "fan", like a propellor, more like a flat surface thats just forcing the air out. This will change the "noise" the fan makes as it spins.....perhaps....
I am by no means an expert, but everyone just seems to say "oh, its a 'moo', the fans doing it, fix it!". Someone needs to just get the fan out of a MB or MBP and run it, see whats doin it.
If I had a MB, I may have tried it myself. But until September time, I'm stuck on a couple of PC's.
