Yes, let's do think about the situation where CPU temps are below "case"
temps.
As I previously posted, my CPU/motherboard temps are 27C/33c at idle and
44C/37c under load. Room temperature is a fairly steady 24.5c. I've tested
this combo with two different P4P motherboards and three different kinds of
monitoring software, including the software ASUS provides with the
motherboard. I get the same results each time. I must conclude that I'm
getting the results that ASUS intended to be gotten. Consider that any
temperature is going to be dependant on the location and calibration of the
probes. Further consider that the board manufacturer must have something in
mind when they select and position their sensor probes.
Now the question. How can CPU idle temperature be less than motherboard
temperature? Answer:
It depends on where the probes are located, cooling efficiency and
architecture, and how much power is being used by the processor. The
motherboard probe is at the warmest point on the board. At idle the
processor generates little heat and is very efficiently cooled. It's quite
possible that it will be cooler than the hottest spot on the motherboard.
At load it's a different situation. The processor generates a lot of heat
and the motherboard changes little. My temperatures are consistent with
this scenario.
Finally, as I noted in a previous post, it is certainly possible to
position probes anywhere and get different readings; however, for a general
discussion, it's most realistic to report the temperatures gotten by the
means the board maker intended, otherwise meaningful comparisons are very
difficult to make. Another question rears it's ugly head. Is it meaningful
to compare temperatures taken from one motherboard manufacturer to another?
I'm guessing no.
"Ed Medlin" <ed DeleteThis @edmedlin.com> wrote in message
news:be960d$2fonr$1@ID-189253.news.dfncis.de...
>
> "jasonoc" <Jason DeleteThis @removethistoreplykoolcats.co.uk> wrote in message
> news:be8ovo$4k4$1@sparta.btinternet.com...
> > have re-applied cpu heatsink with some silicon, temps now are 48-50 idle
> 55c
> > under load so I suppose it maybe due to relatively high case temps (35
> o/c).
> > Will be working on getting case temps down later on in the week (think
> I'll
> > get rid of the scsi drive as its only 72gb anyway). now that i've got
the
> > cpu temps more stable it's time for the overclocking to begin
> > Just hope my generic ddr 400 dosent crap out to quickly!
> >
> Jason,
> My P4 runs just a couple of degrees lower than yours, and like yours, it
> doesn't vary much between idle and heavy loads. My idle is about 43c and
> load is low-50s. Don't pay much attention to some folks who have cpu temps
> lower than their ambient temps. Think about it...
. With air cooling,
how
> can your cpu temp be lower than the case temps? You should be fine but if
> you raise the core v. make sure you keep an eye on your temps and try and
> make your maximum temp stay under 60c. Wish you luck.....
>
> Ed
>
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