[ltp] Re: ThinkPad T61 (7658CTO) Thermal Sensors
Daniel Castro
linux-thinkpad@linux-thinkpad.org
Tue, 22 Jul 2008 16:38:07 +0100
This is a multi-part message in MIME format.
--------------010308050109040203010308
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
I finally found a more reliable answer!!!
http://www.thinkwiki.org/wiki/Intel_Core_2_Duo_(Merom)
It says:
Thermal Specifications
The maximum temperature for safe operation is 100°C.
The catastrophic thermal protection temperature is 125°C.
Idle temperature is typically around 30-50°C.
Temperature at full utilisation is around 60-70°C.
These latter two values will of course depend largely on cooling systems
and available airflow.
So 75C sounds pretty reasonable.
I still would like to know what sensors 9-10-11 are....
________________________
Daniel Castro
Networking and Distributed Systems
Computer Science
Trinity College Dublin
Mobile: 083-318-2058
86.4.3 Trinity Hall, Dartry Road, Dublin 6
________________________
Micha wrote:
> On Tue, 22 Jul 2008 15:52:39 +0100
> Daniel Castro <castromd@tcd.ie> wrote:
>
>
>> Not safe you say... uhm...
>> Well even with the fan constantly running the cpu temp will be around
>> 65C on normal CPU usage.
>> I haven't found anywhere where it actually says what's safe and what's
>> not. Not even on those websites you quote. But anything below 75C for
>> the cpu sounds safe to me. Is it not really?
>>
>> ________________________
>>
>
> not sure about the state of affairs with current cpus but a previous one was amd
> athlon xp which had faulty cooling on that laptop. It would shut the computer
> down at 80c and after it was doing that for a couple of months (pushed it to
> much due to warranty issues) it burned it's self out.
>
> My previous core 2 t7500 (just replaced so no stats on the current one) would
> go up to around 69/70 under stress and then it would start throttling itself.
>
>
>> Daniel Castro
>> Networking and Distributed Systems
>> Computer Science
>> Trinity College Dublin
>>
>> Mobile: 083-318-2058
>> 86.4.3 Trinity Hall, Dartry Road, Dublin 6
>> ________________________
>>
>>
>>
>> green wrote:
>>
>>> On Tue, 2008.07.22, 204, Daniel Castro wrote:
>>>
>>>
>>>> So to elaborate more in this:
>>>> I think I have identified some of the sensors:
>>>>
>>>> dancasmo@BlackBeauty:~$ cat /proc/acpi/ibm/thermal
>>>> temperatures: 59 50 42 -128 50 -128 25 -128 49 54 50 -128 -128 -128
>>>> -128 -128
>>>>
>>>> +------------------------------------------------+
>>>> | Index in "thermal" |Location (estimated) |
>>>> |-----------------------+------------------------|
>>>> | 1 |CPU |
>>>> |-----------------------+------------------------|
>>>> | 2 |MiniPCI |
>>>> |-----------------------+------------------------|
>>>> | 3 |HDD |
>>>> |-----------------------+------------------------|
>>>> | 4 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 5 |Battery 1 |
>>>> |-----------------------+------------------------|
>>>> | 6 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 7 |Battery 2 |
>>>> |-----------------------+------------------------|
>>>> | 8 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 9 |????? |
>>>> |-----------------------+------------------------|
>>>> | 10 |????? |
>>>> |-----------------------+------------------------|
>>>> | 11 |????? |
>>>> |-----------------------+------------------------|
>>>> | 12 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 13 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 14 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 15 |n/a (-128) |
>>>> |-----------------------+------------------------|
>>>> | 16 |n/a (-128) |
>>>> +------------------------------------------------+
>>>>
>>>> I still don't know what indexes 9, 10 and 11 are. Anyone knows? Or any
>>>> ideas how I can figure this out?
>>>> Also, those temperatures are with the fan off, I have it configured to
>>>> be off when CPU temp is below 70C and 60C for the rest. Is that safe?
>>>>
>>>>
>>> No! That is likely not safe. The CPU is, I think, the most
>>> temperature-tolerant area in the system. Watch the other temperatures too.
>>>
>>> Although no one really knows what the safe thresholds are for the sensors.
>>>
>>> http://www.thinkwiki.org/wiki/How_to_control_fan_speed
>>> http://www.thinkwiki.org/wiki/ACPI_fan_control_script
>>>
>>>
--------------010308050109040203010308
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
I finally found a more reliable answer!!!<br>
<a class="moz-txt-link-freetext" href="http://www.thinkwiki.org/wiki/Intel_Core_2_Duo_(Merom)">http://www.thinkwiki.org/wiki/Intel_Core_2_Duo_(Merom)</a><br>
<br>
It says:<br>
<small>Thermal Specifications<br>
<br>
The maximum temperature for safe operation is 100°C.<br>
The catastrophic thermal protection temperature is 125°C.<br>
Idle temperature is typically around 30-50°C.<br>
Temperature at full utilisation is around 60-70°C.<br>
<br>
These latter two values will of course depend largely on cooling
systems and available airflow.</small><br>
<br>
So 75C sounds pretty reasonable.<br>
<br>
I still would like to know what sensors 9-10-11 are....<br>
<br>
<pre class="moz-signature" cols="72">________________________
Daniel Castro
Networking and Distributed Systems
Computer Science
Trinity College Dublin
Mobile: 083-318-2058
86.4.3 Trinity Hall, Dartry Road, Dublin 6
________________________
</pre>
<br>
<br>
Micha wrote:
<blockquote cite="mid:20080722213028.4e9cad16@vivalunalitshi.luna.local"
type="cite">
<pre wrap="">On Tue, 22 Jul 2008 15:52:39 +0100
Daniel Castro <a class="moz-txt-link-rfc2396E" href="mailto:castromd@tcd.ie"><castromd@tcd.ie></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Not safe you say... uhm...
Well even with the fan constantly running the cpu temp will be around
65C on normal CPU usage.
I haven't found anywhere where it actually says what's safe and what's
not. Not even on those websites you quote. But anything below 75C for
the cpu sounds safe to me. Is it not really?
________________________
</pre>
</blockquote>
<pre wrap=""><!---->
not sure about the state of affairs with current cpus but a previous one was amd
athlon xp which had faulty cooling on that laptop. It would shut the computer
down at 80c and after it was doing that for a couple of months (pushed it to
much due to warranty issues) it burned it's self out.
My previous core 2 t7500 (just replaced so no stats on the current one) would
go up to around 69/70 under stress and then it would start throttling itself.
</pre>
<blockquote type="cite">
<pre wrap="">Daniel Castro
Networking and Distributed Systems
Computer Science
Trinity College Dublin
Mobile: 083-318-2058
86.4.3 Trinity Hall, Dartry Road, Dublin 6
________________________
green wrote:
</pre>
<blockquote type="cite">
<pre wrap="">On Tue, 2008.07.22, 204, Daniel Castro wrote:
</pre>
<blockquote type="cite">
<pre wrap=""> So to elaborate more in this:
I think I have identified some of the sensors:
dancasmo@BlackBeauty:~$ cat /proc/acpi/ibm/thermal
temperatures: 59 50 42 -128 50 -128 25 -128 49 54 50 -128 -128 -128
-128 -128
+------------------------------------------------+
| Index in "thermal" |Location (estimated) |
|-----------------------+------------------------|
| 1 |CPU |
|-----------------------+------------------------|
| 2 |MiniPCI |
|-----------------------+------------------------|
| 3 |HDD |
|-----------------------+------------------------|
| 4 |n/a (-128) |
|-----------------------+------------------------|
| 5 |Battery 1 |
|-----------------------+------------------------|
| 6 |n/a (-128) |
|-----------------------+------------------------|
| 7 |Battery 2 |
|-----------------------+------------------------|
| 8 |n/a (-128) |
|-----------------------+------------------------|
| 9 |????? |
|-----------------------+------------------------|
| 10 |????? |
|-----------------------+------------------------|
| 11 |????? |
|-----------------------+------------------------|
| 12 |n/a (-128) |
|-----------------------+------------------------|
| 13 |n/a (-128) |
|-----------------------+------------------------|
| 14 |n/a (-128) |
|-----------------------+------------------------|
| 15 |n/a (-128) |
|-----------------------+------------------------|
| 16 |n/a (-128) |
+------------------------------------------------+
I still don't know what indexes 9, 10 and 11 are. Anyone knows? Or any
ideas how I can figure this out?
Also, those temperatures are with the fan off, I have it configured to
be off when CPU temp is below 70C and 60C for the rest. Is that safe?
</pre>
</blockquote>
<pre wrap="">No! That is likely not safe. The CPU is, I think, the most
temperature-tolerant area in the system. Watch the other temperatures too.
Although no one really knows what the safe thresholds are for the sensors.
<a class="moz-txt-link-freetext" href="http://www.thinkwiki.org/wiki/How_to_control_fan_speed">http://www.thinkwiki.org/wiki/How_to_control_fan_speed</a>
<a class="moz-txt-link-freetext" href="http://www.thinkwiki.org/wiki/ACPI_fan_control_script">http://www.thinkwiki.org/wiki/ACPI_fan_control_script</a>
</pre>
</blockquote>
</blockquote>
</blockquote>
</body>
</html>
--------------010308050109040203010308--