Re: Many problems with a P5GD2-X board
- From: nospam@xxxxxxxxxx (Paul)
- Date: Thu, 22 Sep 2005 05:28:18 GMT
In article <1127356940.774134.54080@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, "Ian"
<ianfort@xxxxxxxxxxxx> wrote:
> Wow, thanks a lot Paul for all this informations, This is really
> appreciated.
>
> Since you posted a reply in this post we will use it as it will be
> simple. Sorry again for the double post :-( My error
>
> Tonight, I concentrated my effort on the heat problem and I have done
> some test that you suggest me to do.
>
> For pictures of my case go here
> http://www.thermaltake.com/xaserCase/tsunami/bwa/bwa.htm It's true that
> there's not a lot of vent holes on the front of my case, but I have
> done a lot of tests with and without the side panel with the exact same
> temp result. So I don't think that the problem came from the too little
> vent hole in the case, but that would have been possible.
>
> I tested the temp in the case with a little thermometer. All the
> temperature tests were made in this manner and for 30 min
> BOINC (to always use 100% of CPU)
> ATI Ruby demo in loop (to produce heat from video card)
> without the side panel and its 90 mm fan
> room temp between 26C and 27C
> CPU-Z running
> ThrottleWatch running
> Asus Probe running
> Q-Fan disable in BIOS (what was done when I received the computer)
> BIOS version 301 (Beta... But at this point !)
>
> So the result are:
> At the base of the case: 28.5C
> Just above HDD: 30C
> At the top of the case between PowerSupply and DVD Drive: 40C
>
> All these temperature seems pretty good to me. The top of the case is
> maybe a little too hot, but it's not where the CPU and other components
> take air.
>
> All the time the tests run (except the first few minutes), the cpu temp
> was between 69C-71C. And according to ThrottleWatch it never slow down
> and run at a steady 3212Mhz. So it seems that the CPU did not hit its
> throttle temperature.
>
> Another test I have done was turn on computer after it was turn off for
> two hours, and quickly go into the BIOS to check the temp of board and
> CPU. The full process take me roughly 12sec and the temp was already
> 35C for the board and 40C for the CPU. Is it possible that the board
> raise its temp of 11C in 12sec with the fresh air that was in the case
> at this moment ???? The room temp, at this time was 24C
>
> It's just an assumption, but with all the informations I have:
> - The CPU fan speed up too late
> - The steady 3212Mhz frequency even at 71C
> - The 11C board temp above ambient air in only 12 sec)
> I think that the sensor reading are not correct. Is it possible ???
> Another thing that let me think that this problem come from an
> incorrect reading from the sensor is that this exact same case run
> pretty well and pretty cool (the temperature of the board never
> exceeded 35C in summer) for about 4 month with a P4P800-E Deluxe board
> and a Northwood 3.2Ghz CPU. But now, I can reach board temp of 50C !!!!
>
> Thanks again Paul for all the informations. I'll await your answer
> impatiently
>
> Tomorrow I'll do some test for the boot (black screen) problem.
>
> Bye
If Throttlewatch says the CPU is not throttling, it sounds like
your theory could be correct. The BIOS temperature readings could
be suspect. But Asus Probe should be doing the temperature
calculation for itself ? I don't think Asus Probe calls the BIOS
to get the temperature, but I suppose in the software world,
anything is possible.
To start with, thermistors are non-linear devices. Any program
has to convert the reading back into a temperature.
What Asus likes to do, is then add a constant offset, to
correct for the position of the sensor, in an attempt to
give what they feel is a more realistic value. That means
there are several sources of error possible in this readout
system.
Your board is probably too new, to expect Motherboard Monitor
MBM5 to work as a monitoring program. I don't have any really
good pictures of your motherboard, but it does look like there
is a Winbond Super I/O chip, and most of those have existed for
a while. So you could give that a try.
Check to see if your motherboard uses a W83627THF, like a number
of motherboards do in this list. The chip is in the upper right
hand corner of your motherboard, just below the socketed flash
BIOS chip:
http://mbm.livewiredev.com/comp/asus.html
The download page for MBM5 is here:
http://mbm.livewiredev.com/download.html
Another Windows program is Speedfan. AFAIK, Speedfan is still
supported, whereas development of MBM5 stopped some time ago.
http://www.almico.com/speedfan.php
What does your thermometer say about the temperature of the
metal on the Southbridge heatsink ? You would think with the
120mm intake fan near the disk drive bay at the lower front
area of the computer case, that there would be good cooling
over top of the Southbridge.
To show you how nonlinear the thermistors are that are
used for temperature readout, take a look at the table
of data I put in this old thread. Near the bottom of
the thread is data for a Radio Shack 271-110A thermistor.
It is the job of any readout program, to undo this
nonlinear function. Not every thermistor has the exact
same shape of curve, and that is where some of the measurement
error comes from (some, but not all the error).
http://groups.google.ca/group/alt.comp.periphs.mainboard.asus/browse_frm/thread/5b38b2b3bb6ceab6
HTH,
Paul
.
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