I think the model number is on the box (under a big barcode iirc). It will probably also be on the back of the console itself I imagine.
All consoles turn out at fan level 1 which is practically inaudible at 10 feet.
A quiet (i.e. normal) console ramps up to level 2 which is a very faint whisper, and stays there about 90% of the time - maybe going to level 3 in summer or when running the F@H client.
A noisy console will ramp up at idle to level 3 or even 4 which is very noisy, then go even noisier when you play a game or run F@H. Obviously you expect the fan to ramp up when it's loaded, but level 3 is too loud (subjectively) for quiet dialogue when watching a DVD, hence my beef with it!
Cheers,
Suman