CrunchBang Linux

Hey everybody!

I just installed Crunchbang and everything runs very fine.
But the fan of my processor (I guess) is always running on fullspeed.
How can I slow it down?

Setup:
Acer S3 Notebook
Intel mobile i7 2nd Generation
Intel HD 3000

My first thought was that there is no driver installed or something like that.
On the Intel Website I can just find a microcodeupdate for my processor to download.
But I guess its not right (not sure ).
Google does not help me either.

But I hope some of you can help me :-)

Greets from Germany,

Arbengie