[Ti] Need cool air vs. heat Advice

~flipper lord.flipper at gmail.com
Wed Jun 15 17:46:28 PDT 2005


Kynan Shook wrote:

>An easy way to tell is to use ThermographX, 
>which can show you the temperature ranges for 
>other people's computers alongside your own.
>http://www.kezer.net/thermographx.html
>
>However, without consulting that program, I'd 
>say that your temperatures are probably in the 
>high end of the normal temperature range.  Most 
>chips can withstand a temperature of about 125°C 
>(that's the internal, or junction temperature), 
>though CPUs tend to have a slightly lower 
>maximum temperature, around 105°C. 
>Unfortunately, there's no easy way to find out 
>how this corresponds to temperatures measured by 
>the OS, which are often thermal sensors attached 
>outside the chip, so they will read less than 
>the junction temperature.  
>Also, keep in mind that the sensors used are 
>generally very imprecise - some of them have a 
>range of accuracy of as much as +-12°C (22°F).
>
>In general, the computer should reduce the CPU 
>speed itself and eventually go to sleep if it 
>thinks it is getting too hot.
>Generally, this means a hardware malfunction - 
>under normal conditions, the fans can easily 
>keep the machine within normal temperatures, 
>even if the case feels quite hot to you. 
>Remember, the case feeling hot is really a 
>*good* thing in some sense - it means that all 
>the heat you can feel is being carried *away* 
>from the processor.

Thanks Kynan,

I'm not really alarmed. The powerbook is running 
great. I was aware of the 'good news' re: the 
heat being dissipated, and the case feeling hot, 
as a result. It's interesting. I've noticed the 
processor (underside sensor) and the 
proc/controller (also underside) will drop about 
10 degrees F, when the Powerbook wakes up from 
'sleep' and an app runs. Seems a bit odd, but one 
never knows.

brian s


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