Real Temp - New temp program for Intel Core processors

[unclewebb]

hendermd: for finding the magic document.

After waiting all these years, I was kind of hoping for more information.

Intel Speak: DTS may ‘bottom out’
Translation: Tough luck buddy, looks like your sensors are sticking.

It's nice of them to publish this but I don't know if we're any further ahead. For my E8400 if TjMax is 100C then the reported temperature based on DTS data would be 47C when the "real" temperature is only 39C. This non linear sensor creates an 8C error here and that error continues to increase as the temperature decreases so at idle I might be out by 15C and my E8400 sensors aren't that bad compared to some I've seen.

If one sensor reads 15C too low and another one on the same processor 15C too high then the data coming from these is pretty much useless for users.

I have no idea where to go from here. It's easy enough to change TjMax but I don't think that brings any of us closer to the actual temperature. Some may get closer but depending on your sensors, you might end up farther away from the real temperature of your processor.

Edit: I've been thinking through this new mess and here's what I've got. Every temperature monitoring program except RealTemp is wrong because it uses a linear model when the data that is coming from these sensors is non-linear. RealTemp is wrong because it is using the wrong TjMax for many processors. Intel's presentation doesn't give us any formulas or anything that anyone can agree on or use to create a formula to convert this DTS data into temperatures.

About all I can do with RealTemp is adjust TjMax and then create the ability to use larger calibration factors to cover up the amount of error that is present in these sensors at idle. Reported temperatures in the temperature range that you operate at may be very close to what RealTemp presently reports if future RealTemp and present RealTemp are both calibrated.

Intel's presentation shows a linear error which I've always assumed but it doesn't clearly show when this error starts. It might start at TjMax.