controlling fan speed on p4

  • Thread starter Thread starter ray
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R

ray

Hi, I have a p4 3.2ghz processor with the stock intel fan and heatsink.

Is it possible to reduce the speed of the fan by using a Zalman fan speed
controller? Trying to reduce noise a little.

Will it do any harm? I used it on my old AMD chip with no trouble, will this
be as easy?

Thanks
Ray
 
ray said:
Hi, I have a p4 3.2ghz processor with the stock intel fan and heatsink.

Is it possible to reduce the speed of the fan by using a Zalman fan speed
controller? Trying to reduce noise a little.

Will it do any harm? I used it on my old AMD chip with no trouble, will
this be as easy?

Thanks
Ray
Click to expand...

HI RAY!

EXCUSE ME FOR SHOUTING BUT YER HEATSINK FAN SURE MAKES A LOT OF NOISE.

Here are the results of my tests on an Intel fan/heatsink:

Intel heatsink fan:

V RPM ma ohms watts
12 2670 145 Loud
11 2420 125 8 0.13
10 2230 115 17 0.22
9 1985 105 29 0.32
8 1730 95 42 0.38 Much quieter
7 1460 80 63 0.40 Barely audible
6 1155 75 80 0.45
5 890 65 108 0.46
4 680 55 145 0.44
3 (fan stalls)

I used a variable voltage external power supply to slow down the fan,
measured current at each speed. Watts is the power dissipated in a
resistor of ohms that would reduce 12volts to the voltage listed in column
1.

My 2.8gHz Pentium 4 is sufficiently cool with 9 volts on the fan for all
uses (including heavy-duty stuff like compiling kernels) and is OK for
daily applications at 7 volts.

Your CPU will need more cooling. Results also depend on how effective your
case fan(s) are at moving air. And how close you live to the Equator and
external heat sources like volcanoes.

Give the controller a try.

Roby
 
Hi, I have a p4 3.2ghz processor with the stock intel fan and heatsink.

Is it possible to reduce the speed of the fan by using a Zalman fan speed
controller? Trying to reduce noise a little.

Will it do any harm? I used it on my old AMD chip with no trouble, will this
be as easy?

Thanks
Ray
Click to expand...

Yes you can use a fan controller, whether it be Zalman or
some other method. It will increase the CPU temp based upon
how much the RPM is reduced, all other factors remaining the
same. You'll have to decide what tradeoff to make.
 
kony said:
On Thu, 2 Dec 2004 20:12:08 -0000, "ray"

Yes you can use a fan controller, whether it be Zalman or
some other method. It will increase the CPU temp based upon
how much the RPM is reduced, all other factors remaining the
same. You'll have to decide what tradeoff to make.
Click to expand...

Adding to that, make sure you disabled monitoring CPU fan in the bios or
some bios like to beep when re-routed. :)
 
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