Core temps vs Junction temps

it would be any core at any one time

They're talking about one of the cores.

No, they aren't.

The thermal specification stated by intel for their IHS equiped CPUs is the tCASE. This is the temperature of the center of the top of the heatspreader.

tjunction is going to be a much higher temperature and this this what the DTS is calibrated to read.

All of that is in Intel's white papers.

Just run RealTemp (or some similar program). If you are below the tjmax, you are below the max rated operating temperature of your CPU. However, the higher you jack up clocks and voltages, the cooler you want to be to have the same kind of CPU life span.

For desktop and server processors, you find your processor in this nice Intel document. And read the whole thing to find out why you have stuck sensors, or why your temps seem to be "sub ambient."

If you have a mobile processor, you go find its datasheet instead.

Now that's one to keep. I see the i7 is actually individually 'calibrated' - nice. Now if Cpu-Z would read that..
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edit - I've contacted the developers of the tool to see if they would add it.

I don't think CPU-Z has ever had a temperature display.

Understood, but if they're showing Vid, they could also show this - it's a static register, not a dynamic sensor.
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I just realised my tjmax was 10 degrees higher than normal in Core temp.. and that I've been reading my temps 10 degreees higher than they actually are. This is sad.. now I realise my water actually works!

But just to make sure.. core temp sai my tjmax was 100, but it's really 90 for a Q66..?

Yep, the q6600's tjmax is 90c.

Feck! All year I've thought I did a bad job on the loop! DAMNIT!!

Now my idle temps make more sense.. and my load temps are much better. Woohoo! Free 10 degrees off!