How much noise does it make your intel mac mini?

In these last days I got my first intel Mac Mini with 512MB of RAM, when powered on, I can hear three different "sounds" coming from it:
1. the fan rotation (a continuos rrrRRRrrrrrrr);
2. the air flow from the back;
3. the hard disk.
The major noise source is the fan rotation, not the air but the fan itself. I didn't hear any other computer or notebook with the fan making so much noise.
I have here a intel duo notebook too, but I cannot hear the fan when it is working.
Since the situation has become worst after 2 GB upgrade(fan is running fast for more time), I am asking mysel if this is normal or if my fan could be faulty.
So I would like to ask all intel mac mini owners here, if they have this noticeable noise source coming from the fan itself.
Here, when the fan goes faster, the noise coming from it is growing too and is bigger than any other sound, bigger then air flow.
It is quite probably that without this annoying "rrrrrrr" sound the mac mini will feel quite silent.
Since some users from other forums are claiming that their mini is very very silent and they do not notice any annoying noise coming from it, please post your feeling with your mac about this.
I am talking about a sound that is quite acute and louder about twice of air flow and three times more then hdd noise.
Thanks a lot for any report about.

It sounds like something is amiss with your mini either the fan or a heat sensor. I bought my duo on July 29th & it's nearly silent. I was surprised how much louder my 12 Powerbook G4 was as I was shifting over data preparing to ship it to the new owner. The only time my mini gets loud is when the super drive kicks in high gear when burning discs. Then it sounds like a fighter jet, but that's normal so I hear . I agree with the majority, you should get it looked at since it should be very quite unless you're using the optical drive.
1.66GHz Intel Mini Duo, 1GB RAM, 100GB HD Mac OS X (10.4.7)

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