would it be usefull to add 120mm fan under laptop

Control: management of fans, temp/rpm monitoring via soft/hardware

Moderators: NeilBlanchard, Ralf Hutter, sthayashi, Lawrence Lee

Post Reply
anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

would it be usefull to add 120mm fan under laptop

Post by anaturelover » Tue Sep 29, 2020 7:44 pm

hi gladies and gentlemens,
i have del precision m90
it gets very loud and when video playing is worst

i have 2 NF S12B FLX NOCTUA FAN 2 OF THEM

2 NF P12 NOCTUA FAN
would it be usefull or negligeable to place them between the desk and the under laptop?

sould il unscrew platic plates so that the air goes more directly inside or other hacks?

how would i power them?

Olle P
Posts: 694
Joined: Tue Nov 04, 2008 6:03 am
Location: Sweden

Re: would it be usefull to add 120mm fan under laptop

Post by Olle P » Wed Sep 30, 2020 2:55 am

First thing to do should be to open the laptop and blow the heatsinks clean from dust. That could do a lot to help you.

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Wed Sep 30, 2020 7:43 am

hum sound like a good idea.

sounds like a unknown territory to me too.

would there be a tuto for that task for this pc somewhere?
could you help me with that ?

Olle P
Posts: 694
Joined: Tue Nov 04, 2008 6:03 am
Location: Sweden

Re: would it be usefull to add 120mm fan under laptop

Post by Olle P » Fri Oct 02, 2020 2:59 am

There are often youtube clips on how to open the laptop (to replace a drive, add RAM or something else). Just type in your model number in YT's search field.

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Fri Oct 02, 2020 8:12 pm

ok i ll try
meanwhile would it change something if i put 2 or 4 120 fans under the laptop? would that reduce the rpm of the fan inside the laptop?

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Fri Oct 02, 2020 8:57 pm

Olle P wrote:
Fri Oct 02, 2020 2:59 am
There are often youtube clips on how to open the laptop (to replace a drive, add RAM or something else). Just type in your model number in YT's search field.
wooo!

i would have to take almost all the laptop apart to reach the fan

so many wire to unconnect its a jungle!

is it safe to just blow in the outtake of air?

CA_Steve
Moderator
Posts: 7476
Joined: Thu Oct 06, 2005 4:36 am
Location: St. Louis, MO

Re: would it be usefull to add 120mm fan under laptop

Post by CA_Steve » Sat Oct 03, 2020 6:37 am

nope

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Sat Oct 03, 2020 2:21 pm

no what

wich point do you say no to

CA_Steve
Moderator
Posts: 7476
Joined: Thu Oct 06, 2005 4:36 am
Location: St. Louis, MO

Re: would it be usefull to add 120mm fan under laptop

Post by CA_Steve » Sun Oct 04, 2020 1:30 pm

anaturelover wrote:
Fri Oct 02, 2020 8:57 pm

is it safe to just blow in the outtake of air?
No

Olle P
Posts: 694
Joined: Tue Nov 04, 2008 6:03 am
Location: Sweden

Re: would it be usefull to add 120mm fan under laptop

Post by Olle P » Tue Oct 06, 2020 12:12 am

anaturelover wrote:
Fri Oct 02, 2020 8:57 pm
i would have to take almost all the laptop apart to reach the fan
so many wire to unconnect its a jungle!
It should suffice to just open it to clean the heatsink(s).
Seems unlikely that you should have to disconnect (m)any wires.

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Wed Oct 07, 2020 6:56 pm

CA_Steve wrote:
Sun Oct 04, 2020 1:30 pm
anaturelover wrote:
Fri Oct 02, 2020 8:57 pm

is it safe to just blow in the outtake of air?
No

ok why is that not safe? ?x

Olle P
Posts: 694
Joined: Tue Nov 04, 2008 6:03 am
Location: Sweden

Re: would it be usefull to add 120mm fan under laptop

Post by Olle P » Thu Oct 08, 2020 3:49 am

Blowing into the ventilation holes is a bad idea for a couple of reasons:
1. If you blow lightly it won't be efficient in removing the dust.
2. If you blow hard (using compressed air or similar) a couple of problems can occur:
a) The airstream "miss" the cooler (if it's not in line with the venting holes).
b) The dust come loose, but gets somewhere else where it shouldn't be.
c) The airstream makes the fan spin at high speed in reverse, causing damage to the fan.
d) The gas molecules rubbing against the surfaces create static electricity, damaging sensitive components.

By opening the case and do the cleaning from the inside you can be much more precise.

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Fri Oct 09, 2020 7:01 pm

Olle P wrote:
Thu Oct 08, 2020 3:49 am
Blowing into the ventilation holes is a bad idea for a couple of reasons:
1. If you blow lightly it won't be efficient in removing the dust.
2. If you blow hard (using compressed air or similar) a couple of problems can occur:
a) The airstream "miss" the cooler (if it's not in line with the venting holes).
b) The dust come loose, but gets somewhere else where it shouldn't be.
c) The airstream makes the fan spin at high speed in reverse, causing damage to the fan.
d) The gas molecules rubbing against the surfaces create static electricity, damaging sensitive components.

By opening the case and do the cleaning from the inside you can be much more precise.
can i do the cleaning with a ear q tip wet?
or do i have to completely take the fan out of the laptop?

Olle P
Posts: 694
Joined: Tue Nov 04, 2008 6:03 am
Location: Sweden

Re: would it be usefull to add 120mm fan under laptop

Post by Olle P » Wed Oct 14, 2020 12:12 am

The fan is rarely the (main) problem.
Dust in the cooling surfaces of the heatsink is, as well as build-up of dust preventing the airflow between the fins.
Use whatever means is most practical to you:
Blow with your mouth, use a cotton cloth, sweep with your finger, ...
You can even use a vacuum cleaner with caution. Keep the nozzle at least an inch away from the computer to avoid static discharges.

anaturelover
Posts: 80
Joined: Thu Jun 28, 2012 12:24 pm

Re: would it be usefull to add 120mm fan under laptop

Post by anaturelover » Wed Oct 14, 2020 8:23 pm

which heat sink? under the fan over the processor

or the long orange metal thing going accross?

do you agree that air compressed air bottle is not a good idea for cleaning the heat sink like others have said above?

Olle P
Posts: 694
Joined: Tue Nov 04, 2008 6:03 am
Location: Sweden

Re: would it be usefull to add 120mm fan under laptop

Post by Olle P » Thu Oct 15, 2020 3:55 am

I don't know what computer you have or how the heatsinks are arranged, but that doesn't matter.
Dust build-up on heatsinks is a problem. If you find dust on a heatsink you should try to remove it.

The "canned air" isn't compressed air but buthane or some other gas. There are three potential problems using it:
1. The gas is often flammable.
2. As the gas flows down the plastic pipe it can get statically charged.
3. It's often not powerful enough to get the surface clean unless you hold the muzzle very close to the dirty surface.
Combine 2. and 3. and you can get ESD-problems that might damage sensitive components.
Add 1. into the mix, and an electrostatic discharge might start a fire.

If using actual compressed air from a regular compressor point 1. is gone, but point 2. gets exaggerated. Then point 3. is reversed, so that the risk is that the high powered air causes mechanical damage...

Post Reply