Tjunction

[htoonthura]

Hello

What is Tjunction?

i guess it is the temperature between cores.

What is the best Tjunction for Q6600. Some says it is the maximum temp before the cpu shuts itself off. I do not understand that thing.

Mine is completely stable at 2. 8 on stock cooling. The core temps are under 55C after hours of prime test on all cores. Core temp says Tjunction is 100C at all times. Do i need to worry about the Tjunction? Can someone explain it to me?

Thanks.

 

[Strobeflux]

When the CPU hits tjunction it will shut it self off for protecting the CPU from damage. so its basically the maximum temp. the CPU will start throttling
at around 80 degrees though first. and if it fails to keep the temp down it
will shut it off.

 

[EXT64]

I like your poll. I voted for NA :lol:

 

[Grimmy]

Tcase is the sensor between the cores or gives the IHS temp reading, which the bios shows a single temp.

Tjunction are the sensors on your cores themselves (DTS or Digital Thermal Sensor). Those temps are read from other programs like CoreTemp that give you the temp off the cores which will be higher.

They both have separate thermal max. Thermal spec from intel would be for the Tcase reading. While CoreTemp will show the Tjuction max... If I understand correctly.

Ummm... the NA vote... is that for taking a grain of salt thing? NA is a symbol for sodium... 😳. o O ( )

 

[CompuTronix]

htoonthura, Grimmy is correct, however, since you are using an older version of Core Temp, there is a point of confusion that I'd like to clear up.

Core Temp is a good utility, however, the older versions have a fundamental flaw in terminology, which creates confusion by obscuring the distinction between temperatures and specifications. Allow me to explain.

Depending upon what processor you're running, Core Temp will show a certain value for Tjunction, which is an incorrect term. The proper term is Tjunction Max, which is the term defined by Intel in their Thermal Specifications, and as shown below:


Tjunction = Core temperature
Tjunction Max = Shutdown

(A) Junction Temperature is a thermal measurement because it scales, thus the term TJ, or Tjunction, which also means Core temperature.

(B) Maximum Junction Temperature is a specification because it does not scale, thus the term TJ Max, or Tjunction Max, which means Shutdown.

(C) ~ 5c below Tjunction Max Throttling is activated. If Tjunction Max is reached, Shutdown occurs, which could be 85c or 100c or 105c according to Core Temp, and varies by processor series.


Since Tjunction Max is only a specification, that's why it's value never changes. To eliminate this source of confusion, the author of Core Temp, Arthur Liberman, changed the term from "Tjunction" to "Tj. Max" on newer versions of Core Temp. The latest version is 0.97.1, which can be downloaded from it's homepage: http://www.alcpu.com/CoreTemp/

As Tcase Max is exceeded before Tjunction Max is reached, Tcase Max is always the limiting thermal specification.

If you want detailed information about how processor temperatures work, and if you want to learn how to properly test, calibrate and monitor your temps so that you're confident that they're correct, then check out the Core 2 Quad and Duo Temperature Guide: http://www.tomshardware.com/forum/221745-29-core-quad-temperature-guide

Hope this helps,

Comp