CPU temps

[Tony Alfrey]

Vu Pham wrote:
> Tony Alfrey wrote:
>> Vu Pham wrote:
>>> Tony Alfrey wrote:
>>> [...]
>>>
>>>
>>>>> Kurt
>>>>
>>>> Yes, but are 26C and 28C really the temperatures of your CPU?  This 
>>>> is lower than body temperature.
>>>>
>>>>
>>>
>>> As long as it is higher than room temperature then it is possible, I 
>>> think.
>>
>> Yes, but it will be higher than the ambient air temperature in the 
>> box.  The finned heat sink itself will be higher than that and the CPU 
>> (sensor is where? - maybe on silicon in the chip?) will be higher 
>> still.  I see from specs that a Pentium IV can dissipate some 60-ish 
>> watts when operating under substantial load (not idle).  I see that a 
>> typical big fan/heat sink combination for CPUs has a thermal impedance 
>> of about 0.6 C/W.  So 60 watts x 0.6 C/W yields a CPU case temp of 36 
>> C above ambient.  If ambient in the box is perhaps a little above room 
>> temp, let's say 35 C then the CPU is at 71 C.  I see that Intel specs 
>> a maximum case temperature of 85 C.
> 
> My office temperature is about 19 oC. 

66 F.  Do you have frost forming on your monitor?  ;-)

> My Quad CPU under normal load is 
> 46 oC and it is overclocked pretty hards so I guess without OC, its temp
> should go down dramatically.
>>
>> So Kurt is right:  103 C is too high, but 26 C sounds as though the 
>> CPU is totally at idle.
>>
>> BTW, how do you make that little °C symbol from the keyboard?
> 
> I use the letter o :)

But that doesn't make it superscript, or tiny.

> 
>>
>> I don't know stink about computers but I know physics.
> 
> Nobody doubts it :)

Yeah, that I don't know stink about computers.

> 
> Btw, where do you live ? When you say the temp is about 35 oC,

Inside the box.  That's about 95 F.  Maybe exaggerating a little.  Maybe 
  85 F in the box is reasonable, with room temperature at 70 F.

> I 
> remember long time ago, where I worked sometimes had no AC, and room 
> temperature could go up to 37 oC, and one day the IBM PC/AT just stopped 
> working because of heat.
> 
> Vu



-- 
Tony Alfrey
tonyalfrey at earthlink.net
"I'd Rather Be Sailing"