Solve : CPU cooling fan only runs for

1.	Solve : CPU cooling fan only runs for
Answer» This is on a self built PC with IBM 830542U mboard. I just got it 2 days ago and blew a ton of dust ect. out of the CPU heat sink, fan, PSU and everything else. I REPLACED this CPU fan with a similar unit but no joy. The mboard has 2 - 3 wire sockets (side-by-side) for fan but I get this same issue when the CPU fan is plugged in to either socket. I don't see another 3-wire socket near the CPU. Is this a normal issue controlled by a CPU temp control? And how do I access this info? What is the question? You don't like the board? You don't like the design? The fan comes on for 2 to 3 seconds. Did you want 5 seconds? That KIND of behavior has a name, but I don't remember what it is called. But it is by design. Not by defect. It lets you know the fan is there and well.Quote from: Geek-9pm on September 28, 2011, 10:50:06 PM What is the question? The fan comes on for 2 to 3 seconds. Did you want 5 seconds? Question = I don't know if this fan cycle is normal for this system - and how can I find out? On all of my other computers, the CPU fan runs anytime the system is running. This system may be different from the others but I'm just trying to make sure. I suspect some systems have thermal monitoring circuits that can enable/disable the CPU fan as needed. This may have this feature, and, if so, how do I find out if this is so? Thanks, MikeYes, you hare a point. The documentation for that IBM motherboard is hard to find. When the system comes on there are Power On Self Test routines that test components. One of these is to turn on the fan(s) momentarily. Without the documentation, it is hard to say if that feature was on that model. Do you have speed fan? HTTP://download.cnet.com/SpeedFan/3000-2094_4-10067444.html Monitor the CPU TEMPERATURE and see if it is inside normal range. The fan should come on when the temperature gets above a certain point. To force it, you might put a blanket over the case for a bit and see if the fan comes on when the temp gets high. This graph is from Intel and applies to many P4 CPU. It may or may not typify your system. Notice this is in internal chassis temperature, which you could measure with an ordinarily probe or thermometer. About 40 C the fan should run a moderate speed. A chassis temp of 40 C is about 104 F and can be hard on a system with a weak fan. Hope this is of some help. Check in the BIOS. There is sometimes an option for this.Quote from: quaxo on September 29, 2011, 03:13:36 AM Check in the BIOS. There is sometimes an option for this. Yes quaxo, and thank you! I found that setting in the BIOS. The CPU fan is running continuously now. So I would think this suggest that there is a CPU temp monitoring feature on this machine, correct? How do I access the information for CPU temps? Quote from: Geek-9pm on September 29, 2011, 01:33:51 AM Do you have speed fan? No, but thanks to you I do now. Quote Notice this is in internal chassis temperature, which you could measure with an ordinarily probe or thermometer. About 40 C the fan should run a moderate speed. A chassis temp of 40 C is about 104 F and can be hard on a system with a weak fan. Hope this is of some help. Thank you so much G9PM. Now that my CPU fan is running the temps, as displayed by SpeedFan look good. My SpeedFan temps are: Local temp = 35c Remote temp = 34c HDQ = 34c Temp 1 = 35cQuote from: lectrocrew on September 29, 2011, 03:41:40 AM How do I access the information for CPU temps? I don't know what make the BIOS is in that board, but some include (somewhere) temperature readings. The alternative, which you've discovered, is using a Windows program, such as Speedfan.

Answer»

This is on a self built PC with IBM 830542U mboard. I just got it 2 days ago and blew a ton of dust ect. out of the CPU heat sink, fan, PSU and everything else.
I REPLACED this CPU fan with a similar unit but no joy.
The mboard has 2 - 3 wire sockets (side-by-side) for fan but I get this same issue when the CPU fan is plugged in to either socket. I don't see another 3-wire socket near the CPU.
Is this a normal issue controlled by a CPU temp control? And how do I access this info?
What is the question? You don't like the board? You don't like the design? The fan comes on for 2 to 3 seconds. Did you want 5 seconds?
That KIND of behavior has a name, but I don't remember what it is called. But it is by design. Not by defect. It lets you know the fan is there and well.Quote from: Geek-9pm on September 28, 2011, 10:50:06 PM

What is the question? The fan comes on for 2 to 3 seconds. Did you want 5 seconds?

Question = I don't know if this fan cycle is normal for this system - and how can I find out?
On all of my other computers, the CPU fan runs anytime the system is running. This system may be different from the others but I'm just trying to make sure. I suspect some systems have thermal monitoring circuits that can enable/disable the CPU fan as needed.
This may have this feature, and, if so, how do I find out if this is so?
Thanks,
MikeYes, you hare a point. The documentation for that IBM motherboard is hard to find. When the system comes on there are Power On Self Test routines that test components. One of these is to turn on the fan(s) momentarily. Without the documentation, it is hard to say if that feature was on that model.
Do you have speed fan?
HTTP://download.cnet.com/SpeedFan/3000-2094_4-10067444.html
Monitor the CPU TEMPERATURE and see if it is inside normal range. The fan should come on when the temperature gets above a certain point. To force it, you might put a blanket over the case for a bit and see if the fan comes on when the temp gets high.
This graph is from Intel and applies to many P4 CPU. It may or may not typify your system.

Notice this is in internal chassis temperature, which you could measure with an ordinarily probe or thermometer.
About 40 C the fan should run a moderate speed. A chassis temp of 40 C is about 104 F and can be hard on a system with a weak fan.
Hope this is of some help.
Check in the BIOS. There is sometimes an option for this.Quote from: quaxo on September 29, 2011, 03:13:36 AM

Check in the BIOS. There is sometimes an option for this.

Yes quaxo, and thank you! I found that setting in the BIOS. The CPU fan is running continuously now. So I would think this suggest that there is a CPU temp monitoring feature on this machine, correct? How do I access the information for CPU temps?
Quote from: Geek-9pm on September 29, 2011, 01:33:51 AM

Do you have speed fan?

No, but thanks to you I do now.
Quote

Notice this is in internal chassis temperature, which you could measure with an ordinarily probe or thermometer.
About 40 C the fan should run a moderate speed. A chassis temp of 40 C is about 104 F and can be hard on a system with a weak fan.
Hope this is of some help.

Thank you so much G9PM. Now that my CPU fan is running the temps, as displayed by SpeedFan look good. My SpeedFan temps are:
Local temp = 35c
Remote temp = 34c
HDQ = 34c
Temp 1 = 35cQuote from: lectrocrew on September 29, 2011, 03:41:40 AM

How do I access the information for CPU temps?

I don't know what make the BIOS is in that board, but some include (somewhere) temperature readings. The alternative, which you've discovered, is using a Windows program, such as Speedfan.

Solve : CPU cooling fan only runs for

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