chipset fan on VIA KT400

[Lennart Sorensen]

On Sun, Mar 03, 2013 at 03:38:14PM -0500, D. Hugh Redelmeier wrote:
> | From: David Collier-Brown <davec-b-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org>
> 
> | There may be a readable temperature indicator on the chip, despite its
> | age. If so, you can probably read it with moderate privilege...
> 
> Thanks.  That sent me on a couple of hours' quest through lm_sensors
> and settings for a ten year old motherboard (hint: in 10 years, the
> config language has changed slightly, and so has the character set).
> 
> CPU core:    +1.68 V  (min =  +1.66 V, max =  +1.84 V)
> DDRAM:       +1.34 V  (min =  +1.17 V, max =  +1.33 V)   ALARM
> 3v3 I/O:     +3.33 V  (min =  +3.14 V, max =  +3.47 V)
> +5V:         +4.93 V  (min =  +4.76 V, max =  +5.26 V)
> +12V:       +12.10 V  (min = +11.39 V, max = +12.61 V)
> -12V:       -12.81 V  (min =  -7.17 V, max = -16.76 V)
> -5V:         -8.29 V  (min =  -2.48 V, max = -10.02 V)
> Stdby:       +5.17 V  (min =  +4.76 V, max =  +5.26 V)
> CPU Fan:    2343 RPM  (min = 1599 RPM, div = 4)
> BOX Fan:       0 RPM  (min =  897 RPM, div = 8)  ALARM
> IT87 Temp:   +44.0\302\260C  (low  = +15.0\302\260C, high = +55.0\302\260C)  sensor = thermistor
> 
> I don't actually know where the thermistor is.  Some overclockers were
> saying that it is closer to the KT400 chip than the CPU.
> 
> Some of the voltages look questionable.  But maybe the readings are
> wrong and maybe the specs of my actual components differ from what the
> config file specifies.
> 
> Of course a bad voltage could explain why one of the TV tuners in this
> box (out of four) wasn't working properly.

Unless you have the config correct for your board with all the right
parameters, you won't get correct voltage readings.

In fact most of them look good.  The -12V could be that off because
nothing is using it (which often makes the voltage regulator not do a
good job),which could also explain the -5V.  Neither of those is actually
used in most systems (but are part of the PCI standard and hence have
to be supported even if almost no PCI card ever uses them).

-- 
Len Sorensen
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