What kind of resistor should be appropriate for my laptop?

[Kynix]

My laptop fan standard 5v 0.35a, the original sound really loud. It became very light when I plus a 30 ohm resistor. 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!

 

[Kabelsalat]

Why not use a propriate software to regulate the fans?

I suggest you trying to see if SpeedFan will work on your laptop. Also remove dust from the heat sink, fan blades and other places where dust spoils the cooling effect.

 

[KeithM]

What brand and model is your laptop? If we know that we might be able to give you some more specific ideas

 

[Kynix]

I suggest you change the fan in place


Installation of resistance will result your situation and can't meet the speed requirements of high-speed load.

Thank u ,But I still want to have a try.Anyhow,it's a kind of way to relax myself.

 

[Kynix]

Why not use a propriate software to regulate the fans?

I suggest you trying to see if SpeedFan will work on your laptop. Also remove dust from the heat sink, fan blades and other places where dust spoils the cooling effect.

oh ,I haven't even thought about that. YES. I could have a try.

 

[Kynix]

What brand and model is your laptop? If we know that we might be able to give you some more specific ideas

It's Lenovo B490 .Thanks a lot .

 

[Kynix]

If you do not want to change the fan, to buy a 30 - 40 ohm NTC resistor, this is a high negative temperature coefficient thermistor temperature. The higher the temperature, the lower the resistance, your problems can be solved. 40 degrees at 0 ohm resistor ,60 degrees at 20 ohm resistor, 100 degrees around 2 ohm resistor.

Installation is very simple, ntc pasted inside the heat pipe installed in the notebook above, both ends of the fan connected to the cut ends of the red line (that is, you, like 30 ohm resistor connection, just stick to the heat pipe).

Okay , I want to try a propriate software to regulate the fans.If I couldn't make it well.I will try your way. Thank u so much for providing me a detailed description.