TSK's Crazy Theory on TJmax and the DTS - Page 3 - Overclock.net

ramenmeal · 03-10-08

i wish this was true for me, then i'd be idling below my ambient

GigaByte · 03-10-08

I wonder if Core 2 desktop CPUs don't even have a Tj max at all, and the temps are raw from the DTS.. I am going to do this soon with my E4500 using several monitoring programs.

**Retrospekt** · 03-10-08

Quote:

Originally Posted by ramenmeal

i wish this was true for me, then i'd be idling below my ambient

You can't know if you are truly idling below the ambient unless you get a temp probe, and a really accurate one.

Everything messes up another thing. The only way this could be tested is with a surface temperature monitor (they're expensive).

GigaByte · 03-10-08

Just came up with another thermal testing idea from this thread, a different one from those done so far, in 1hr (probably more) I shall have results, as I am doing some work on my E4500 as I type this from the Pentium 630 rig.

TheSubtleKnife · 03-10-08

I found this info from intel

Quote:

In the event of a catastrophic cooling failure, the processor will
automatically shut down when the silicon has reached a temperature
approximately 20 °C above the maximum TC.

which means that is should shut down at 93.2C (73.2+20) actual temps. Take the average of the last readings of 111C and 123C that i got before it shut down, and you get 118C. subtract 118 by 21.8(Realtemp Tjunc 95 - Tcasemax73.2)= 96.2C, which is pretty darn close to the temp that its supposed to shut down at.

TheSubtleKnife · 03-10-08

Updated the original post with the info in the previous post

unclewebb · 03-10-08

This is what Intel says about the Mobile Core2Duo chips:

Section 5.1.3
http://download.intel.com/design/mob...s/31674505.pdf

"Regardless of enabling the automatic or on-demand modes, in the event of a catastrophic cooling failure, the processor will automatically shut down when the silicon has reached a temperature of approximately 125°C."

I think the last screen shot must have been very close to thermal shut down.

For the Desktop Core processors there is nothing written in stone in the Intel docs. I might have to go buy one of these cheapy processors tomorrow to do some proper testing with my IR thermometer.

GigaByte · 03-10-08

Can you post the source link of that info please.

TheSubtleKnife · 03-10-08

@ unclewebb you just missed my above post i think...lol, also, mobile CPU's are made to take more heat the desktop counterparts

arekieh · 03-10-08

Nice test TSK

		Overclock.net - Overclocking.net > Intel > Intel CPUs
TSK's Crazy Theory on TJmax and the DTS

03-10-08	#27 (permalink)
unclewebb New to Overclock.net Join Date: Mar 2008 Posts: 29 Rep: 8 Unique Rep: 8 Trader Rating: 0	This is what Intel says about the Mobile Core2Duo chips: Section 5.1.3 http://download.intel.com/design/mob...s/31674505.pdf "Regardless of enabling the automatic or on-demand modes, in the event of a catastrophic cooling failure, the processor will automatically shut down when the silicon has reached a temperature of approximately 125°C." I think the last screen shot must have been very close to thermal shut down. For the Desktop Core processors there is nothing written in stone in the Intel docs. I might have to go buy one of these cheapy processors tomorrow to do some proper testing with my IR thermometer.

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