I got 3 working 360's the 250GiB is the loudest and the problem im having trouble with. When i turn it on the fan inside gets massively loud like as loud as a convecter heater or standing next to a 150MPH wind turbine then it gets quieter then louder etc etc so on and so forth. the xbox isnt doing anything but being on. then i'll start a game that is installed and moments while playing the fan gets louder and louder then goes quiet the 10 min later or so the fan starts getting louder again. the xbox is well ventelated and does the same thing on all games. its giving me a headache.
Microsoft claim the S or slim is whisper quiet.. well don't believe everything they tell you.