Intel TAT / CoreTemp / IDCC all different temperatures....

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Absolutely and that's fine for you, Bing, myself and everyone else who has followed this thread but I guess you're missing the point of my post .

My point was that this information needs to be easily accessible to the average overclocker and it doesn't appear to be.

Agree, if its accurate, it will be every OC-er dream isn't it ?

But unfortunately the answer is "NO", you won't and can't get that info since Intel doesn't have it for them self !

1st thing pop out from the mind after reading my above statement is "Huh ? Why & How the heck I know that ?"

Ok, here are my explanations, its just basic electronic that every EE learned on their 1st year and "common sense".

1st, you have to understand that popular "tdiode" in that silicon die is basically a plain jane diode, and it is the very basic structure of silicon electronic.

A diode consist of "PN junction" (try wiki yourself, since it will be too long here) that has an interesting physical characteristic, it has a predictable and very linear behaviour response on it's temperature coefficient which is approx. 1.22 mV/deg F or 2.2 mV/deg C.

So whenever there is a changes in the temperature, we could track the changes (delta) temp quite accurate, hence it is used intensively to control the cooling parameter in Intel CPU mechanism, for example adjusting fan speed accodingly, or throttling up/down the PWM controller and etc. The word PECI come in mind !

Now you might ask how about the absolute temp reading ?

This is the weakest point, cause no diode in this world have a same temperature offset even they were produced in the same batch. Unless you could make that diode by assembling atom by atom at the precise location for all diodes.

So to make an accurate absolute reading, we must calibrate each diode in a controlled temperature room at high & low temp to get the offset temp for "EACH" diode.

If Intel want to give us an accurate temp reading on "EVERY TDIODE" in the CPU they sell, they must calibrate "EVERY TDIODES" that is spreaded in that CPU at silicon die level. Fyi, each CPU has more than one Tdiodes.

Layman term, they have to toast every cpu die and measure every tdiode in it at the temperature controlled room at cold and hot in order to get the offset of each tdiode and write/burn down that offset value into the CPU die.

Sounds complicated isn' it ? Ok, even it is not complicated, you must agree that this "extra" process needs an extra production cost right ?

Now, imagine you were Intel management, that always struggling to optimize your production cost at each CPU. Do you want to do that ?

Remember, Intel "officially" never endorse or encourage overclocking on their CPU.


Hope this helps.