Sign in with
Sign up | Sign in
Your question

A way to increase cpu fan when cpu temp. increase ?

Last response: in Motherboards
Share
April 29, 2010 1:58:16 PM

Hello everyone,
got an old asus P5WD2 + zalman cnps8700 led + p4 630 3ghz ,
the cpu fan comes with "volume" button to increase fan speed manually
yesterday, without noticing it, cpu temp. reached 80°c !! due to a buggy program.
wondering if there is a way to make the cpu fan increases speed when, lets say the cup temperature reaches 65 or 70°c
in the bios ? may be , or some utilities ?

thanks for responding
a b V Motherboard
April 29, 2010 5:20:28 PM

In case you don't have one, you can get a copy of your manual HERE.

Now, I have now way of testing this, so it's purely based on what the manual says. On pdf page 104 [4-36], there are some settings that could work. It looks like in the BIOS, if you enable Q-Fan Control and set it to DC instead of PWM, the motherboard should regulate the 3-pin CPU fan's speed. Also, set the CPU Fan Profile to Optimal. You might have to disconnect the fan from the controller box that came with it, though.

Again, unless someone else can confirm, it's basically trial and error with testing those settings. Good luck.
April 29, 2010 8:47:45 PM

I have a newer ASUS motherboard with the same but slightly newer version of q-fan. What you want to do is get rid of any controllers you have on your CPU fan, just plug the 4pin header into your mobo. Go into bios as obsolete99 said and find the q-fan setting. Set the CPU fan to PWM, as it should be, and set the (forget the name setting) to optimal. This will make you CPU fan much quieter, and still regulate speed with temperature. HOWEVER I have found that it does not keep the system ice cool, my Phenom x3 is about 34C at idle and will easily go over 50C under load, q-fan does increase the fan speed, just I have never seen it take the speed to maximum when needed, generally within 500rpm or so. I like it though because my CPU is never uner a lot of load, even games, so it keeps the system very quiet.

Enjoy Q-Fan!
Related resources
April 30, 2010 11:01:16 PM

obsolete99 said:
In case you don't have one, you can get a copy of your manual HERE.

Now, I have now way of testing this, so it's purely based on what the manual says. On pdf page 104 [4-36], there are some settings that could work. It looks like in the BIOS, if you enable Q-Fan Control and set it to DC instead of PWM, the motherboard should regulate the 3-pin CPU fan's speed. Also, set the CPU Fan Profile to Optimal. You might have to disconnect the fan from the controller box that came with it, though.

Again, unless someone else can confirm, it's basically trial and error with testing those settings. Good luck.


thanks
I did what you said , enabled Qfan control and set to Dc ( since it's a 3pin cpu fan )
cpu fan profile set to optimal
but I haven't disconnected the controller box, just as safe measure just in case
April 30, 2010 11:06:37 PM

hamiac said:
I have a newer ASUS motherboard with the same but slightly newer version of q-fan. What you want to do is get rid of any controllers you have on your CPU fan, just plug the 4pin header into your mobo. Go into bios as obsolete99 said and find the q-fan setting. Set the CPU fan to PWM, as it should be, and set the (forget the name setting) to optimal. This will make you CPU fan much quieter, and still regulate speed with temperature. HOWEVER I have found that it does not keep the system ice cool, my Phenom x3 is about 34C at idle and will easily go over 50C under load, q-fan does increase the fan speed, just I have never seen it take the speed to maximum when needed, generally within 500rpm or so. I like it though because my CPU is never uner a lot of load, even games, so it keeps the system very quiet.

Enjoy Q-Fan!


it's a 3 pin cpu fan
anyway thanks , I 'll enjoy Qfan :) 
a b V Motherboard
April 30, 2010 11:21:13 PM

Let us know how it goes...
May 5, 2010 12:27:05 PM

obsolete99 said:
Let us know how it goes...


I'm using CPUID hardware monitor , and now the fan is reacting accordingly when cpu temp. is at 65 °c, the fan speed reaches 1900 rpm

cpu temp. when it 's idle is at 55°c
Mb temp. ( or what 's called SYSTIN in the CPUID HW monitor ) is at 45°c

now my only concern is with the Motherboard temperature.
wondering if it 's a normal MB temp. , or should I worry about it ?

using
P5WD2 MOB + P4 intel 630 + CPU FAN Zalman CNPS8700LED + one FAN case at the back running.
one Fan set front of the sata HArd disk not activated

thanks taking time replying
May 5, 2010 10:59:17 PM

That fan temperature is a bit too high for my liking. I would like to think that 55C is the max CPU temp. Whats the max fan RPM for that cooler you got? What kind of temps were you running before when you just leave it at full speed?
If that setting in q-fan is optimal I would try proformance to see if you can get that temp down a bit (or a lot)
May 6, 2010 10:55:55 AM

hamiac said:
That fan temperature is a bit too high for my liking. I would like to think that 55C is the max CPU temp. Whats the max fan RPM for that cooler you got? What kind of temps were you running before when you just leave it at full speed?
If that setting in q-fan is optimal I would try proformance to see if you can get that temp down a bit (or a lot)


Hello hamiac
I'm trying "performance" setting, and now the cpu temp. is at 51°c when idle
and Mob. temp is at 41 °c
why do you say that 55C is the max CPU temp. ??

it's an old prescott Intel CPU 630
according to this link "http://www.cpu-world.com/CPUs/Pentium_4/Intel-Pentium%2..."

Minimum/Maximum operating temperature (°C) is 5 - 66.6

it's ok to keep the Qfan at "optimal" setting ? no ?

May 6, 2010 9:01:36 PM

Well yes it is ok because you are not going over the max temp though it can cause an early death for your CPU when its consantly at is maximum temperature. I just depends how much you want scilence over temperature. I would just reccomend a larger HSF that will cool really well at low revs.
What is the ambient temperature of the room your computer is in? My computer never has a motherboard temp over about 35C, even if the CPU is at 50C
May 7, 2010 2:36:05 PM

hamiac said:
Well yes it is ok because you are not going over the max temp though it can cause an early death for your CPU when its consantly at is maximum temperature. I just depends how much you want scilence over temperature. I would just reccomend a larger HSF that will cool really well at low revs.
What is the ambient temperature of the room your computer is in? My computer never has a motherboard temp over about 35C, even if the CPU is at 50C


the ambient temperature, well let's say is at 20 to 22°c
what CPU do you got ? not a prescott, I assume.

May 8, 2010 12:11:10 AM

No, its actualy a Phenom x3 720, so yes, completly different, though I think it has a higher power output than a prescott?

Did you ever get any readings from the origonal HSF? Also I remeber reading somewhere that some CPU temp monitors are out by 10C for some software reason - sorry that all I got.
a b V Motherboard
May 8, 2010 3:16:02 PM

Those temps do seem a bit high, but like hamiac said, it could be the software you are using. What temp does the BIOS show? What sort of airflow are you getting inside your case? How long ago did you last seat/install the Zalman HSF? In the end, it could also be inaccurate sensors.
May 15, 2010 6:21:17 PM

Thanks guys for adds up,
software used : CPU ID hardware monitor on win xp
and gkrellm on Fedora linux
the values are almost the same on both : i.e
CPU temp. around 50°c
MOB temp around 40°c and above to 45 °c when stressing the cpu ( or after 2 or 3 hours of work)

on the bios, cpu temp: 60°c and 40°c for the MOB ( that depends also if I've just rebooted ) I may find much cooler if the pc was shut off for a while

for "air flow" settings :
using an old NZXT black steelcase that comes with
a 80mm case fan at the back and one on the front unplugged
( front of the SATA MAxtor HD)

I've removed the side panel, this helped by decreasing by 5°c the temps.

I haven't installed the Zalman CPU fan by myself, this was done at the store where I bought it.
As you may have guessed , I'm not a hardware geek but willing to :) 

so any advice are welcome.

thanks.

May 15, 2010 11:12:13 PM

You could probably leave your side panel on and just plug in the intake fan on the front and get the same decrease in temperature. Your BIOS will be the one that is right, and 60C is really high. Either your CPU has a too higher power output or someone who installed the heatsink has not put it on very well, either bad application of paste or bbad quality, or none!
May 17, 2010 8:03:22 AM

hamiac said:
You could probably leave your side panel on and just plug in the intake fan on the front and get the same decrease in temperature. Your BIOS will be the one that is right, and 60C is really high. Either your CPU has a too higher power output or someone who installed the heatsink has not put it on very well, either bad application of paste or bbad quality, or none!


plugged the 80 mm intake fan on the front, it didn't make much difference, just a slight 1°c decrease in CPU & Mob .temp,
should I buy 120mm case fans for the back and front ?
like zalman ZM-F3, will it help ?

thanks

May 17, 2010 9:53:11 AM

Yes more fans would help, but to be honest, it would be easier/maybe cheaper just to buy a new CPU cooler. That way you will have a very low CPU temp (depending on the cooler you choose) and again depending, you will have a quieter PC because you can run the fan slower and will not need extra case fans.
May 22, 2010 2:00:10 PM

hamiac said:
Yes more fans would help, but to be honest, it would be easier/maybe cheaper just to buy a new CPU cooler. That way you will have a very low CPU temp (depending on the cooler you choose) and again depending, you will have a quieter PC because you can run the fan slower and will not need extra case fans.


I'm still puzzled of what to do
a new cpu cooler ? a bigger heatsink ? better than the one I have now
from where I live , I don't think I can find a cheaper cpu fan here with a bigger heatsink

besides, I notice that the Mob. temp. increases over time from 33 to 44 or 45 °c after one or two hours
I'm still thinkin it's air flow problem


a b V Motherboard
May 22, 2010 5:34:26 PM

Before you go out and get a different heatsink, try re-seating the Zalman. Over time, thermal paste/grease (TIM/TIC) could lose its effectiveness, especially the lower quality stuff. On the plus side, it doesn't look like you have to remove the mobo from the case to do so. As far as what TIM to use, I still use Arctic Silver 5, there are quite a bit to choose from. Reading around these boards might help you decide, also whats available in your area. This being a test and possibly one piece of the puzzle, the wanted results are not guaranteed.

Once you get the cooler off, clean the existing TIM off the cooler and CPU with some rubbing alcohol (medical alcohol pads) and a lint free cloth (coffee filter). HERE's the cooler's site that has a manual to download and a little animation on how to install it. Most TIMs have a curing period, so if there's going to any change over your current temps, it might not be too noticeable right away.

If you're willing to go through this, good luck to you and we'll wait for the results...
May 22, 2010 9:32:42 PM

Yes, I agree with obsolete99, it would be worth a shot to try some new thermal paste. Just for the record I use Arctic Cooling MX-2. Really, as long as you just get a well known brand and give it a shot you will be able to tell if it was the paste.
!