Yep, 5 fans. And 3 HDD is needed for movies, they are big and don't fit on 4.7 or 8.5GB optical media.
On temporal basis, the noisiest is the power source, but only in games, and the seek noise of a Maxtor 500GB hdd.
The offenders on permanent function is the 12cm fan on top of the case and the HP LP3065 monitor (buzzing if is not at maximum luminosity, and a added coil noise if i display some black&white charts).
Obviously is not silent as the computers with 1 HDD and a single 12cm fan at under 600rpm seen on this forum.
![Shocked :shock:](./images/smilies/icon_eek.gif)
And the difference probably is big
But compared with an empty Aplus Xclio II case with the 25cm fan at minimum, is a little more silent.
![Wink :wink:](./images/smilies/icon_wink.gif)