CPU fan gets stuck on high

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Machine description:
Dell Precision 470 (latest bios)
Single Xeon 2.8GHz/1MB/800MHz (HT is enabled)
Yada, yada, yada
Windows XP Pro (SP2)


When the CPU gets a high amount of utilization, the fan kicks in high and
loud.  When the utilization stops, the fan *never* slows down until the
system is rebooted.  It is not related to a single program; anything can do

I tried loading the latest Intel chipset driver (v7.2.2.1006) for the E7525
chipset, but have not seen any change.

I'd like a solution or at least a utility that will reset the fan speed.  If
anyone knows how I could do it programmatically, I could write it.

PS: I've tried Dell support and their forums and they're useless.

Walter Williams
"Do, or do not. There is no try."

Re: CPU fan gets stuck on high

<sparticus1701AThotmailDOTcom> wrote:

Quoted text here. Click to load it

I cannot find any info on the motherboard in that machine.
I presume it has a hardware monitor chip, but I don't know
what firmware/software is controlling the fan. It could be
a BIOS function, or some tool running in Windows.

A popular program is SpeedFan, from http://almico.com/sfdownload.php
It can program popular hardware monitor chips, and adjust the
fan speed as a function of temperature. Now, whether it will
work with, or conflict with, whatever is controlling the
fan right now, I cannot say.

Intel retail fans are designed to sense the case air temperature,
and they ramp their fan speed as the case air temperature rises.
After the CPU load drops back down from 100%, you would think
eventually the computer case temperature would drop, and with
it, the fan speed. (In other words, a fan can be controlled
by the hardware monitor chip, or the fan itself can respond
to thermal conditions. With the Dell, I don't know what is
inside the box. The E7525 suggests that perhaps the Dell uses
an Intel server board, but there are other manufacturers who
could have made the motherboard.)


Re: CPU fan gets stuck on high

Thanks for your reply.

I installed it, but it doesn't appear to be able to work with my
motherboard.  The report is as follows:

Win9x:NO  64Bit:NO  GiveIO:YES  SpeedFan:YES
I/O properly initialized
Linked ISA BUS at $0290
Linked Intel 82801EB ICH5 SMBUS at $ECE0
Scanning ISA BUS at $0290...
Scanning Intel SMBus at $ECE0...
Unknown Winbond1=$CDCD ID=$81 on SMBus at $2E
Unknown Winbond2=$DA64 ID=$B3 on SMBus at $2E
SMART Enabled for drive 0
Found ST340014AS (40.0GB)
SMART Enabled for drive 1
Found Maxtor 7B300S0 (300.1GB)
End of detection
Error loading event -->
Loaded 0 events

I believe the board is manufactured by Dell themselves, so I don't believe
it has a model number.  I submitted my info to SpeedFan, but I don't know if
I'll see anything.

Walter Williams
"Do, or do not. There is no try."

Quoted text here. Click to load it

Re: CPU fan gets stuck on high

See the CPU temp..When it kicks high,the temp must be high.There must
be a temp
on-off control.Best is - you should fix a slightly higher
speed fan.

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