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Is TJ Max of 98* true?

post #1 of 9
Thread Starter 
Hi OCN

Just wondering if the stated TJMax of 98* is correct?

I've read here that anything over 72* can be a chip killer?

Would just like some solid confirmation smile.gif

Cheers (sig rig)
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post #2 of 9
72C is just one of the internets many max temps for the chip, its a nice temp to stay below if you can, but you won.'t damage it thats for sure.

At 98C the processor will thottle down or cut out to avoid damage.
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post #3 of 9
Quote:
Originally Posted by swindle;15430609 
Hi OCN

Just wondering if the stated TJMax of 98* is correct?

I've read here that anything over 72* can be a chip killer?

Would just like some solid confirmation smile.gif
Cheers (sig rig)

meh I had a AMD dual core passed 130C 3ghz 1.6volts


chip still works.


Only realized I had a issue when it BSOD.
Edited by punker - 10/24/11 at 1:40am
    
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post #4 of 9
Thread Starter 
See, I was breaking 65* under load with the stock cooler (waiting on TIM to refit the H70) and started to freak out! lol

I hate high temps. I'm planning to OC only a touch for BF3. Just really can't afford to kill this chip, and plus, its uber fast on stock and I love it!

I just came from a PII X4, so this is like a whole different world of processor...
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post #5 of 9
Quote:
Originally Posted by swindle;15430665 
See, I was breaking 65* under load with the stock cooler (waiting on TIM to refit the H70) and started to freak out! lol

I hate high temps. I'm planning to OC only a touch for BF3. Just really can't afford to kill this chip, and plus, its uber fast on stock and I love it!

I just came from a PII X4, so this is like a whole different world of processor...

For daily use anything under 75 is good I say, especially with some OC.

Sent from my I500 using Tapatalk
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post #6 of 9
Just a note here: temps are measured with distance to temperature junction (max).
If this is 0 the chip will throttle. It decreases the hotter the chip is.
    
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post #7 of 9
Quote:
Originally Posted by swindle;15430609 
Hi OCN

Just wondering if the stated TJMax of 98* is correct?

I've read here that anything over 72* can be a chip killer?

Would just like some solid confirmation smile.gif

Cheers (sig rig)
The Tj. Max is indeed 98°C. This belief that anything over 72°C comes from people looking at pages like this:

http://ark.intel.com/products/52210/Intel-Core-i5-2500K-Processor-%286M-Cache-3_30-GHz%29

They scroll down looking for a temperature and then they see 72.6°C, so then they just take that and run with it while assuming it's talking about the core temperature. However, it's just the "T-Case" temperature. This used to be known as the "Thermal Specification", but "T-Case" is a little bit more revealing of what this temperature is talking about and where it is measured. A part of the description Intel used to have for "Thermal Specification" said that it is measured at the "geometric center" on the "topside" of the CPU's integrated heatspreader. So, it's measured at the same spot where we apply thermal paste.

This means that 72.6°C has nothing to do with the maximum safe core temp (even though the cores are the source of the heat).

Besides, if 72.6°C were really the maximum safe core temp, then most Sandy Bridge owners would have killed their CPUs a long time ago.
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post #8 of 9
~72C is the TCASE, or the temperature of the surface of the heatspreader.

~98C is the TJmax or the temperature of the junction between the die and the bottom of the IHS.

At stock speeds and stock voltages, you will not reach ~72C tcase until the tjmax is pushing ~98C.

Since you cannot read tcase without milling a trench in the surface of your CPU's IHS and epoxying a thermal probe in it, and since all monitoring software tries to read distance from tjmax from the intel DTS, you want to keep the 98C in mind, and ignore the 72C.
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post #9 of 9
Thread Starter 
Awesome information.

Thanks heaps smile.gif
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