Systems running hot?

[James Phillips]

--- On Tue, 12/22/09, James Phillips <anti_spam256 at yahoo.ca> wrote:

> From: James Phillips <anti_spam256 at yahoo.ca>
> Subject: Re: Systems running hot?
> To: "Dag-Erling Smørgrav" <des at des.no>
> Received: Tuesday, December 22, 2009, 6:21 PM
> 
> 
> --- On Tue, 12/22/09, Dag-Erling Smørgrav <des at des.no> wrote:
> 
> > From: Dag-Erling Smørgrav <des at des.no>
> > Subject: Re: Systems running hot?
> > To: "James Phillips" <anti_spam256 at yahoo.ca>
> > Cc: freebsd-current at freebsd.org
> > Received: Tuesday, December 22, 2009, 5:30 AM
> > 
> > Well, Those Of Us [tm] who actually read the docs and
> wrote
> > the driver
> > know that the temperature is reported by the CPU
> itself as
> > a 6-bit
> > number which represents degrees Celsius below the
> junction
> > temperature.
> 
> Thank-you for the clarification. That does indeed match my
> experience (but I never trusted the number because the CPU
> fan does not spin up to full speed even when the CPU is at
> its maximum rated (case) temperature). It is the "Core" CPU
> temperatures that are made-up:
> 
> "The reported CPU core temperatures are not comparable
> across BIOS revisions. The (reported) core temperatures
> averaged about 77C for the 0052 version, about 88C for the
> 0059 revision, about 64-68C for the 0065 revision, and about
> 86-88C for the the 066 revision. For the 0068 revision the
> reported avg. core temps were 83-85C (All under the same
> Prime95 load.)"
> 
> "Call For testing" - wall of text describing my
> frustrations with the Cooling of an Intel Board.
> http://forums.xkcd.com/viewtopic.php?f=36&t=32700&p=1615440#p1615440
> 
> > I have no idea where your 65534 came from, but it
> certainly
> > didn't come
> > from the CPU.  It may have come from an i2c probe
> > mounted on the
> > motherboard, possibly somewhere near the CPU, or maybe
> the
> > BIOS made it
> > up out of thin air, or maybe you were actually reading
> the
> > clock, not
> > the temperature.
> > 
> 
> The BIOS does indeed pull the number out of it's *ss. It is
> a composite number formed from about 3 different sensors on
> the motherboard.
> 
> Regards,
> 
> James Phillips
> 
> 
> 
>      



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