Innovation Cooling's Diamond 7 TIM test results

[123bob]

Started doing some more research into the linearity of the internal DTS temp diodes in these CPUs. I have not waded through Intel's dissertations on the subject yet but did come across a couple of interesting links. I'll wade through Intel's stuff this weekend.

The other big program out there is Real Temp. I'm starting to run that with Core Temp to see how they compare.

Some 33 pages of stuff on it available in our own forum here. I have not read it fully but there appears to be some calibration options available with it.

Real Temp program available here.

Interesting article on the theory behind CoreTemp here.

I'm going to start an attempt at looking at the linearity of my readings using both of these programs. I'll be reporting both sets of temps for the new machines I'm about to crack into. As soon as I get some new film, I'll be cracking into these machines, all with fuzion blocks.

I should report that I DID have one interesting result on Farm-09 right after I did the second pressure test. I booted after re-appling paste after the second lapped pressure test. Coretemp was reporting temps about 3 degrees LOWER than before. That was idle and load..... I thought it would be a eureka moment, but I didn't trust the result. I re-booted the machine and the temps went right back to par with the prior results.....Very suspicious....I could not repeat it, but clearly some mechanism was involved. (And no, I was not eating too much paste at the time....)

(Side note to Dr. SiG. I've actually been muttering "need some octo-cores, need some octo-cores... It might have sounded like "need more quad-cores", but I mutter very well..... Don't know if that makes a difference in your therapy plans, just thought I should be honest with the good Doctor....)

Regards,
Bob

EDIT: Another interesting link. Good for reading if you can't sleep....G'Night all!!

EDIT2: The documentation and theory of Real temp here, suggests that only the high end of the temp range is calibrated. This is interesting since what we are seeing seems to be compression at load. I'll have to give this some thought....

I read further into the reference made in the above doc and thought this extract was of note. The whole article is here.

"More than a few programs have been released over the last few years, each claiming to accurately report these DTS values in real-time. The truth is that none can be fully trusted as the Tjunction values utilized in these transformations may not always be correct. Moreover, Intel representatives have informed us that these as-of-yet unpublished Tjunction values may actually vary from model to model - sometimes even between different steppings - and that the temperature response curves may not be entirely accurate across the whole reporting range. Since all of today's monitoring programs have come to incorrectly assume that Tjunction values are a function of the processor family/stepping only, we have no choice but to call everything we thought we had come to know into question. Until Intel decides to publish these values on a per-model basis, the best these DTS readings can do for us is give a relative indication of each core's remaining thermal margin, whatever that may be."

My bold italics. I may be tilting at windmills to think I can get reasonable, linear data out of the internal diodes.....

This would say that for TIM testing, the lab setup is the way to go and the testing we do is really more about the mount efficiency and characteristics. The pressure film testing is a very good addition for this purpose. (Side note - Tasty, just for completeness, I would be curious to see what a film test of your lab setup would look like. Would it be a relatively solid patch in the contact area of the test rig? )

That said, I'll move on to the Fuzion machines when I get more film.