I've got an asus board (p5k premium) and ive just installed speedfan in win7. the asus al-suite isnt very good for adjusting fan speed because reboot is required to take effect .
Speedfan lets you adjust your fans instantly and you can set all your parimeters just how you want them, I can't believe its taken me this long to find this great little app.....
If you put a shortcut to it in your startup folder, it'll load up on boot.