[lm-sensors] ASUS P5B DELUXE WiFi with Winbond W83627DHG

[Christian Mahr]

..2nd try

Hi David

I am still researching on the fans on the asus board. 

One problem I came across:
for fan5 the reading drops sharply from about 1325 rpm to zero when I lower 
the voltage. Note the fan is definitely moving still, the fan physicall can 
do much slower.

fan5_div shows 4 and does not step up as with fan 1 and 4 where I can see _div 
on 128.

fans 1,4 and 5 seem all to be controlled by pwm4 on this board.

to my understanding fan5 should behave as the others and step up the divider 
when lowering the voltage, isn´t it?

Best regards
        Christian
Am Montag, 30. Oktober 2006 00:12 schrieb David Hubbard:
> Hi Christian,
>
> > Sorry, I should have explained. The CPU-Fan connector on the P5BDeluxe
> > Wifi is a 4-pin, but my CPU-Fan itself has only 3 pins. As I tried to use
> > the marked 3 pins(the 3-pin connector still fits into the 4 pin) I could
> > not control the speed via the Bios (this is probably the purpose of the
> > 4th pin on a 4 pin connector?) --> it stayed on a somewhat noisy speed.
> >
> > So I decided to use one of the 3-pin-CHA1_FAN-connector (all other Fan
> > connectors do have 3 pins) for the CPU-fan and tried this one instead -->
> > it works. All calm cool and quiet now.
>
> Okay, your sensors.conf will be different from the "standard" one for
> this motherboard, because you map the CPU fan to a different fan
> number.
>
> > This is pretty neat as the Bios apparently cannot handle this correctly.
> > If the speed is below, say, 700 rpm or so, the Bios (when the "FAN page"
> > is opened) becomes very slow and behaves strange sometimes.
> >
> > Is this a "auto-div" function of the chip or the driver?
> >
> > Does this mean you do not need to set it in the sensors.conf ? This
> > should be mentioned later specifically in the comments in sensors.conf,
> > isn´t it?
>
> You don't need to set the divs. In fact, I don't think you can. The
> driver does the div scaling.
>
> > Interestingly enough the "sys" is very close to "CPU" in temperature
> > wheras Bios shows 7 degrees more for the CPU (???).
>
> The "sys" temperature is measured inside the W83627DHG. You can test
> this, if you like, by chilling a large metal object and then holding
> it to the chip. But your chip may be integrated with the rest of the
> chipset. Your mileage may vary.
>
> > Question:
> >
> > Which CPU sensor is meant here? The Core2Duo has got 2 of them internally
> > (see coretemp driver) - is this a 3rd one?
> >
> > > The AUX temp may need to be configured correctly. Can you see any
> > >
> > > variation? It may also be that the pin on the chip is not connected to
> > >
> > > anything, and just floating.
>
> The AUX temperature input is a pin on the W83627DHG which measures the
> voltage from a thermal diode or thermistor. It is up to the
> motherboard manufacturer to decide whether to connect it to a sensor,
> or leave it floating. I don't know what it is measuring. The coretemp
> driver measures the temperature of your CPU using a completely
> different interface, and is not related to temperatures reported by
> the W83627DHG.
>
> David



	
		
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