Om man inte vill köpa en färdig fan controller så kan man ju bygga sin egen.
How to Create a Three-Speed Fan Control Without Spending a Dime
http://www.hardwaresecrets.com/article/496
Make your own fan controller
http://www.custompc.co.uk/howtos/601285/make-your-own-fan-con...
http://www.custompc.co.uk/howtos/walkthru/601285/make-your-ow...
Fläktarna kan också styras av detta lilla program:
SpeedFan
http://www.almico.com/speedfan.php
"SpeedFan monitors temperatures, through available hardware monitor chips which expose their temperature sensors connected to different places inside your computer, and, according to your setup, does its best to keep them at your desired value. You can even change a fan speed according to the temperature of your hard disk. When choosing parameters for the minimum and maximum fan speed, try to set them by hand (disable all the VARIATE FANs checkboxes) and listen to the noise. When you hear no noise from the fan then you can set that value as the minimum fan speed for that fan. I suggest using 100 as the maximum value, unless you hear a lot of noise from it, in which case you might reduce the maximum speed to 95 or 90. Obviously, nothing says that you can't set 60 as your maximum value and, sometimes, I myself set it that way. Consider that when the WARNING temperature is reached, the program sets the fan speed to 100, whichever maximum speed you set. One last word should be said regarding the USE FAN x listbox. In my pc, more than one temperature changes when a fan runs faster. You can say on which fan every temperature should rely. On my system, TEMP1 and TEMP3 are both influenced by FAN1. "