Can I replace the 92mm case (exhaust) fan in my pre-built Dell PC with another off-the-shelf 92mm case fan?

himmatsj

Reputable
Feb 23, 2014
162
0
4,690
Is this possible, or must I only replace it with the exact same stock model that comes with the Dell PC?

The case fan is 92mm, and connects to a 3-pin hole on the motherboard. It is regulated by temperature on my motherboard (TMPIN1) and is a PWM fan.

However, it does get pretty noisy when it ramps up to 100% when I am playing something like the Witcher 3. Even when at idle, the noise is noticeable. I'm not 100% sure, but it does seem like over the past 3.5 years, the fan has gotten noisier.

So my plan is to replace it with a 92mm fan from the likes of Arctic or Cooler Master or Noctua which are apparently much quieter...but before I pull the trigger I need some confirmation from here. On the Dell forums I haven't got a reply in days.

Just to confirm, if this is indeed possible, will the new fan be able to be controlled by the TMPIN1 temperature, just as the stock Dell case fan is controlled?

Thanks!
 
Solution
All PWM fans have 4 wires the wire your missing is the PWM wire.
http://img.techpowerup.org/110517/pwm_diagram.jpg
That has nothing to do with the motherboard limiting the voltage to a fan according to temperature. You cut the voltage down on a fan it slows down you increase the voltage it speeds up. I run all my fans with a fan controller all it does is cut the voltage down from 12 volts to lower the speed of the fan.
Back to the original quest still the same answer.
Yes you can switch it out but make sure you get a fairly high CFM to dissipate the heat I rather have some noise when the parts are stressed than have heat issues.

himmatsj

Reputable
Feb 23, 2014
162
0
4,690


Well I can assure you this stock Dell fan is 3-pin and it is a PWM fan (controlled based on motherboard temperature).

So these fans don't exist in the market then?
 

Zerk2012

Titan
Ambassador
All PWM fans have 4 wires the wire your missing is the PWM wire.
http://img.techpowerup.org/110517/pwm_diagram.jpg
That has nothing to do with the motherboard limiting the voltage to a fan according to temperature. You cut the voltage down on a fan it slows down you increase the voltage it speeds up. I run all my fans with a fan controller all it does is cut the voltage down from 12 volts to lower the speed of the fan.
Back to the original quest still the same answer.
Yes you can switch it out but make sure you get a fairly high CFM to dissipate the heat I rather have some noise when the parts are stressed than have heat issues.
 
Solution