Max Tjunction temperatures

[dikal]

Good evening!

I was searching to find the maximum Tjunction temperatures (temp in cores ?) for the 2nd generation i5 processors, and especially for the i5-2400.
But I had no success.
CoreTemp and RealTemp show that it is 99C for the i5-2400. Is that temperature correct?

Thank you very much in advance! 

[Dark Mantis]

Hi

I believe that is correct but you can verify that on the Intel website.

[dikal]

Hi DM!

On the Intel web site http://ark.intel.com/products/52207/Intel-Core-i5-2400-Processor-(6M-Cache-3_10-GHz) shows a "TCASE" temp, which is 72.6°C.
I found that TCASE temp is different than the core's temps, and calculated, so is not accurate. That's why I'm looking for that "Tjunction" temperature.

[Dark Mantis]

TCase is always quite a bit lower than TCore. You could try asking GGTS for the exact figure.

Just enter your email address and click on the language of choice. For the UK:


GGTS   http://ggts.gigabyte.com/

Please expect several days for a reply.

[dikal]

Thank you DM. I'll do it, if I won't find the max core temperature for the cpu 

[Gloup_Gloup]

Hi dikal, 

I think, in the DataSheet of each CPU ... you find a infos like a Tjunction temp...

Gloup_Gloup

[dikal]

Hi Gloup_Gloup ! Nice to "see" you again ! 
No, unfortunately, there is no such information 

On the Intel web site http://ark.intel.com/products/52207/Intel-Core-i5-2400-Processor-(6M-Cache-3_10-GHz) shows a "TCASE" temp, which is 72.6°C.

[Dark Mantis]

There should be data sheets for each Intel CPU. On these all parameters are listed.

[dikal]

Sorry, the best that I could find so far is this http://www.techpowerup.com/realtemp/docs.php

Thanks for all the answers 

[Gloup_Gloup]

Hi dikal and Dark Mantis,  

I add this infos for other members of forum....

Q: What does “Maximum System TDP” mean?

A: Maximum System TDP is the aggregate of the maximum TDP values for the Processor(s), MCH, and ICH of the grouping you have chosen or the search feature has found. Note that MCHs and ICHs may have varying TDP values depending on the number of active memory channels, the front-side bus speed, and other such factors. Please consult the respective Thermal Design Guides for the parts in question. For the sake of safe estimates, we have always chosen the highest possible TDP values.
Q: What's the difference between Max TDP and Stepping TDP?

A: For processors, the TDP will sometimes vary depending on the stepping of the processor. The Max TDP is the highest TDP value of all the steppings. Stepping TDP is the TDP for that particular stepping of the processor.

Source : http://ark.intel.com/info/faq


Every fan reacts to PWM control differently. 4-wire fans usually exhibit a rather linear response. 3-wire fans can be much less linear. It depends on several factors, including the circuitry on the motherboard and the type of fan used.

Source : http://www.almico.com/sfarticle.php?id=5

Digital PWM Power Options Explained In Full
Source : http://forums.overclockers.com.au/showpost.php?p=13942173&postcount=6

Gloup_Gloup

[Gloup_Gloup]

Hi all, 

I add general infos :

Sandy Bridge Overclocking Guide & 5GHz CLUB
http://forums.pureoverclock.com/showthread.php?12386-Sandy-Bridge-Overclocking-Guide-amp-5GHz-CLUB

Extract :

What is Tcase?

Tcase is the temperature measure from the center point of the surface of heatspreader. Some motherboards use
calculation by coding algorithms in BIOS, others may use surface mounted diode sensors. These methods of measurement
is not the same as what and how the processor maker have prescribed in obtaining Tcase temperature as stated in
figure 6.2. The only way to measure processor temp accurately or at least close enough to Tcase temp listed in the
processor specification is to use a calibrated thermometer and place a temperature probe at the center of heatspreader.
This is ann impossible method for most of us but there is an alternative method is to place a temp probe close to the
center as possible then add 10°C to the reading to provide a temperature equivalent to Tcase specified.


Gloup_Gloup

[Gloup_Gloup]

Hi Gloup_Gloup ! Nice to "see" you again !  
No, unfortunately, there is no such information  

On the Intel web site http://ark.intel.com/products/52207/Intel-Core-i5-2400-Processor-(6M-Cache-3_10-GHz) shows a "TCASE" temp, which is 72.6°C.

Hi dikal,

Thank a lot, for your ''Nice to ''see'' you again!...  
Wow... funny welcome...

Just add infos about your hardware situation... I add a ''ask question'' ... see here
http://forum.giga-byte.co.uk/index.php/topic,8007.msg64150.html#msg64150

Gloup_Gloup

[Rolo42]

I thought it was 90C and I thought I read it in the datasheet but its changed and a definitive chart is no longer there; it implies 99C.  I really wouldn't want to go above 90.

The only way to be certain is to put the stock HSF on it and run IntelBurnTest; the temp when it down-clocks is TJmax.

[dikal]

Hello everybody! 

Thank you very much for your participation!

Well, actually I have no problems with my hardware, since I changed my PSU to CoolerMaster GX-650.
I just wanted to know which is that "Tj-max" temp for my cpu (i5-2400), so I can regulate fans and noise.
But then I realized that "Tj-max" is also an estimation (Intel "assumes" it is 99C in the guide that we have)!

So to be safe, we "assume" that it is close to 90C ...

My temp readings, with stock cooler, and after Intel burn test (maximum, 1 time) are :
CPU:61C, cores:66,72,71,68C 
Are these alright?

[Dark Mantis]

Those temps seem fine to me if they are maximums. There's not much that will push the CPU as much as the Intel Burn Test so under normal circumstances you should be fine.