What kind of resister should be used in my laptop?

My laptop fan standard 5v 0.35a, the original sound really loud. It became very light when I plus a 30 ohm resistor--http://www.kynix.com/Parts/868678/HR0130.... But the temperature will getting higher when cpu was busy. Should I change it ? What kind of resistor should be appropriate? Or is there some formula or not? I will be very appreciate if you give me some advice. Thanks a lot!

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@amandali this is not a resistor issue but a fan issue. As you have noticed by adding a resistor you are impeeding the fan and running a chance of over heating. Replace your fan.

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Thanks a lot. I have already replaced my fan.

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AmandaLi will be eternally grateful.
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