Intel DTS sensors

[Simaomacaco]

I have been trying to figure out the workings of the DTS to understand why reported temperatures is not precise. I read the realTemp guide and some presentations about the sensors from intel. My understanding is this:

Temperatures amongst core on CPU are broadly similar although have differences from the production process with semiconductors. Also, the DTS themselves dont measure a temperature well. Example, perhaps core 0 DTS counts in units of 1.05C whereas the other cores are some other unit maybe 0.97. This does not matter to intel as the design of the DTS was just to measure distance fom TJMax, these small variations in the actual scale of the units does not matter much. The sensors sole job is to safety trip at TJMax. Unit variations make an accurate temp C hard from just using the DTS. Intel seem to recommend using an average from the four cores as the best measure, makes sense given my understanding.

Source: http://www.techpowerup.com/forums/attachment.php?attachmentid=19489&d=1224601917

Close to understanding or need to read more?

 

[arknor]

TBH I have no idea but I do know some applications show what I'm guessing is the temp of the whole cpu?

Thats hwinfo64 btw
Btw "core temp" should actually say core #1 and core #2 I renamed them so it shows that label in afterburners OSD

 

[unclewebb]

The temperature sensors on the 45nm Core 2 Duos were horrible. Intel learned that users complain too much about not knowing their core temperature so the sensors they have been using on all of their Core i CPUs are much improved. There seems to be a lot less slope error and sensors no longer get stuck at normal idle temperatures like they used to do.

Intel added a new register to their 2nd Generation Core i CPUs that software can read which contains the CPU Package temperature. If you are using a Quad Core processor, this constantly takes data from the 4 individual sensors, compares it, and outputs the highest temperature to the CPU Package register. This greatly reduces the amount of sensor error. A big problem has always been sensors that read too low at idle. Reporting the highest core temperature as the Package temperature eliminates this problem since the sensor that report too low are automatically ignored. Being able to monitor one number instead of 4 or more is a lot easier than watching 4 core temperatures randomly dance up and down.

RealTemp T|I Edition
http://www.overclock.net/t/1330144/realtemp-t-i-edition

 

[Simaomacaco]

Cool, thanks for the link and the explanation.

 

[arad85]

Gotta love unclewebb - learned a lot from him in just a few succinct posts - thanks