Hi,

I have a asus p5ad2-e board with an intel p4 3.2 Ghz being cooled by a
thermalright xp-120 unit with a nexus 120mm real silent case fan
[D12SL-12]. Since installing this coolling solution my machine is much
more quiet, however, on start up I get a bios error stating cpu fan
fail. Once I hit F1 to bypass the error, asus probe 2 shows the cpu fan
going at ~1028 with temps of CPU around 28 C / 82 F. I have the nexus
fan connected via the cpu fan [3 pin connector] on the motherboard. the
fan is mounted to be drawing air away from the motherboard.

Any suggestions on how this bios error should be remedied? Have I
connected something incorrectly?

Thanks,

George

(E-Mail Removed)

(E-Mail Removed) wrote:
> Any suggestions on how this bios error should be remedied? Have I
> connected something incorrectly?
>

Visually check that the fan is running. If it is, then it's connected
OK and probably just turns to slowly for the BIOS.

I don't know the specifics of your board, but I just ignore the error on
mine. Since I put in a 120mm fan, it spins too slow on startup to be
recognized but the BIOS as "running". There may be a way to turn it off
in your BIOS.

--
"Outback" Jon |
1986 Kawasaki Concours |1976 Honda CB750F (needs work)
2003 Kawasaki Concours (wreck)|1972 Yamaha DS7 (project)
(E-Mail Removed)|CQ CQ CQ de KC2BNE
ASHI Certifed CPR / First Aid Instructor
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(E-Mail Removed) wrote:
> Hi,
>
> I have a asus p5ad2-e board with an intel p4 3.2 Ghz being cooled by a
> thermalright xp-120 unit with a nexus 120mm real silent case fan
> [D12SL-12]. Since installing this coolling solution my machine is much
> more quiet, however, on start up I get a bios error stating cpu fan
> fail. Once I hit F1 to bypass the error, asus probe 2 shows the cpu fan
> going at ~1028 with temps of CPU around 28 C / 82 F. I have the nexus
> fan connected via the cpu fan [3 pin connector] on the motherboard. the
> fan is mounted to be drawing air away from the motherboard.
>
> Any suggestions on how this bios error should be remedied? Have I
> connected something incorrectly?

It could be that that fan runs too slowly or takes too long to spin up
to satisfy the BIOS - you might have to disable the CPU fan failure
detection in the BIOS, or change the threshold, if you can..

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from (E-Mail Removed)
Home Page: http://www.roberthancock.com/

In article <(E-Mail Removed)>,
(E-Mail Removed) wrote:

> Hi,
>
> I have a asus p5ad2-e board with an intel p4 3.2 Ghz being cooled by a
> thermalright xp-120 unit with a nexus 120mm real silent case fan
> [D12SL-12]. Since installing this coolling solution my machine is much
> more quiet, however, on start up I get a bios error stating cpu fan
> fail. Once I hit F1 to bypass the error, asus probe 2 shows the cpu fan
> going at ~1028 with temps of CPU around 28 C / 82 F. I have the nexus
> fan connected via the cpu fan [3 pin connector] on the motherboard. the
> fan is mounted to be drawing air away from the motherboard.
>
> Any suggestions on how this bios error should be remedied? Have I
> connected something incorrectly?
>
> Thanks,
>
> George
>
> (E-Mail Removed)

I believe your average monitor chip measures the period
between pulses from the fan, and not the frequency as such.
The monitor chip has scaling settings, that determine the
slowest and fastest fan speeds that can be measured. It is
not clear to me, whether Asus uses the lowest scale possible
when their BIOS sets up the monitor chip or not.

I see a fan with that part number here. 1350RPM at 12 volts.
Depending on whether you power the fan directly from a disk
drive connector, or from the slightly reduced voltage you
might find on a PWM controlled fan header, will determine
whether you get the full 1350RPM.

http://www.yateloon.com/dcfan-2.htm

On an older motherboard, my minimum fan detectable is 1800RPM.
(I've read that some Asus boards do much better than that.)
If one of my fans dips below 1800, it reads zero. I'm willing to
bet, if the scaling register was set differently for the
monitor chip, you could use a lower RPM fan without a problem.

I see this setting in the BIOS. Perhaps if the "Wait on" function
is disabled, you'll sail through the fan check ?

Wait for "F1" if error [disabled]

The manual doesn't show the ability to toggle the actual fan
measurement field in the BIOS to [disabled], as that is the
mechanism used in some BIOS, to stop a fan from being monitored.

HTH,
Paul