Mobo "case" temp sensor vs actual case temp

The sensor that reports "case" temperature on my (Epox socket A) mobo,
typically reads in the 95-100F range. If I stick a thermometer inside my
case (it sits on the bottom next to the empty PCI slots), it reads about 20F
less. Could there be that much difference given that they can't be more
than 8-10" apart or is the case temp sensor likely close to some heat
producing chip?

"Lee M." wrote in <news:AOidnQVq4d5yWrnVnZ2dnUVZ_oninZ2d@comcast.com >:

> The sensor that reports "case" temperature on my (Epox socket A) mobo,
> typically reads in the 95-100F range. If I stick a thermometer inside my
> case (it sits on the bottom next to the empty PCI slots), it reads about 20F
> less. Could there be that much difference given that they can't be more
> than 8-10" apart or is the case temp sensor likely close to some heat
> producing chip?

Is it hotter next to the boiling teapot or away from it? Is it hotter
next the refridgerator evaporator coils or away from them? Is it hotter
next to the hot air furnace outlet vent or away from it? You really
think there is going to be a uniform temperature inside your case? You
are actually surprised that it's hotter inside the case next the hot
stuff than away from the hot stuff?

On Fri, 9 May 2008 17:53:51 -0400, "Lee M." <lmacmil@forget_it.com>
put finger to keyboard and composed:

>The sensor that reports "case" temperature on my (Epox socket A) mobo,
>typically reads in the 95-100F range. If I stick a thermometer inside my
>case (it sits on the bottom next to the empty PCI slots), it reads about 20F
>less. Could there be that much difference given that they can't be more
>than 8-10" apart or is the case temp sensor likely close to some heat
>producing chip?

You may be able to locate the case sensor by monitoring the
temperature while heating and cooling various locations with a hair
dryer and fan. Spray freeze may narrow it down to the actual
thermistor.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

"VanguardLH" <V@nguard.LH> wrote in message
news:g030gs$obv$1@registered.motzarella.org...
> "Lee M." wrote in <news:AOidnQVq4d5yWrnVnZ2dnUVZ_oninZ2d@comcast.com >:
>
>> The sensor that reports "case" temperature on my (Epox socket A) mobo,
>> typically reads in the 95-100F range. If I stick a thermometer inside my
>> case (it sits on the bottom next to the empty PCI slots), it reads about
>> 20F
>> less. Could there be that much difference given that they can't be more
>> than 8-10" apart or is the case temp sensor likely close to some heat
>> producing chip?
>
> Is it hotter next to the boiling teapot or away from it? Is it hotter
> next the refridgerator evaporator coils or away from them? Is it hotter
> next to the hot air furnace outlet vent or away from it? You really
> think there is going to be a uniform temperature inside your case? You
> are actually surprised that it's hotter inside the case next the hot
> stuff than away from the hot stuff?

Thanks for that incisive response :-)

"Lee M." <lmacmil@forget_it.com> wrote in message
news:AOidnQVq4d5yWrnVnZ2dnUVZ_oninZ2d@comcast.com. ..
> The sensor that reports "case" temperature on my (Epox socket A) mobo,
> typically reads in the 95-100F range. If I stick a thermometer inside my
> case (it sits on the bottom next to the empty PCI slots), it reads about
> 20F less. Could there be that much difference given that they can't be
> more than 8-10" apart or is the case temp sensor likely close to some heat
> producing chip?
>
Yes. The crucial temp is the environment the chips are working in, that is,
on the main board. So the sensor reads the temp on the mainboard and ideally
as close to the processor as possible.