Cooling experts out there, some help please

alvin at alvin at
Mon May 21 15:31:32 PDT 2001

hi dan

our system that is constantly measuring temps..
it ranges around 38C ... loaded or unloaded...

varies with day and night... though... ( they turn off
air conditioning :-)

have not dealt with dual cpu and i2c...

for heating/cooling experiment... you;d basically have to 
be willing to burn up a cpu ... because if it gets too hot,
the cpu will die in mysterious ways..

yoy can also blow cigarette smoke to see the airflow...
and disconnect fans that does NOT affect airflow
	- you'd need a clear plastic top to see it

have fun

On 9 May 2001, Dan Christensen wrote:

> <alvin at> writes:
> > I'd add i2c to one of the systems and start a cpu
> > temperature tests...over several days/weeks...
> > 	- an idle cpu will give you "ambient cpu temperature"
> I just tried lm-sensors/i2c on a dual processor PIII system and it
> reports that the cpu temps are +2C when idle and around 16C when
> loaded.  Obviously these are wrong.  The question is, are they
> usually wrong by a constant amount?  So can I assume that my
> cpu's are at something like 32C when idle and 48C when loaded?
> I want to know this because I want to disconnect some of the eight
> fans that the retailer put into this box!  Seems a bit excessive
> to me (and noisy) but I don't want to mess with it without knowing
> for sure whether they are needed.
> Anyone have any good recommendations for quiet fans?  Or fans
> that only switch on when things get hot?
> Dan
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