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View Full Version : patiesība par tCase


shb-
01-16-11, 21:44
Labvakar!
Nea, es patiesību nezinu, bet vaicāšu to jums.

Pateicoties tam, ka overklokošana ir hobijs/iemīļota nodarbe daudziem, bet šie daudzi (domāju arī es) pārsvarā izmanto ļoti vispusīgas zināšanas par un ap OC, nets mudž no pretrunīgas, nekorektas, nepilnīgas utt info par tēmu. Viens ir skaidrs - intel savu cpu portfolio skaidri un gaiši norāda [max] tCase.

To, ka DTS rādījumi nav tCase zinās katrs. Bet, kas tad īsti ir tCase?

http://www.iceflatline.com/2009/12/my-intel-core-i7-build-putting-it-together/
Back in the good old days (you know, before Core i7), you would typically pay attention to the “CPU temperature” the motherboard was reporting. This is the processor’s Tcase temperature, the temperature at the geometric center of the topside of the integrated heat spreader as measured (or estimated) by a sensor IC. This temperature value is routinely used by utilities such as Everest, SpeedFan, as well as ones provided by the motherboard manufacture, to report the thermal condition of the processor. According to Intel, Tcase should be maintained at or below the thermal threshold listed in the processor’s datasheet.

http://www.overclock.net/intel-cpus/307372-core-temp-tcase-vs-tjunction.html
If your cpu temp is mobo sensor - labeled in red, you can see it is no where near the cooling heat sink either, and once again is poorly representing Tcase.
I think you made a mistake on the last part, CPU temp is the Tcase, you seemed to have said CPU temp and Tcase are different. There is only 2 temps, Tcase and Tjunction, Tjunction means core temps. I am not trying to bash you but if you think Tcase is wrong or unimportant you are going head to head against the company that made these processors, the info for Tcase is right on their site.

http://tonymacx86.com/viewtopic.php?f=49&t=7316&start=10
Ambient = Temperature inside the *PC* case. Should be about 22C. This is NOT the same as:
tCase = "CPU" temperature = temperature of the heat spreader (CPU case, if you like)
tJunction = "Core" temperature = temperature of the individual cores within the CPU

http://www.overclockers.com/forums/showthread.php?t=525629
Tc (Tcase - Intel labs): Temperature measured at the geometric center of the surface of the CPU. The only way to measure it is to crave a hairline groove in the CPU and apply/solder a hair-sized thermostat probe into the CPU's IHS. This is the way Intel measured the temperature to give the Thermal Specification of each CPU.

Tcase (On-die): This temperature is measured between the cores. It is a sensor included in every Core 2 Duo and Quads. This reading shows up as "CPU Temp" on most programs. It is a little hotter than the Tc from the Intel labs "Thermal Specification"

Tj: Is measured right in the CPU's die, the main silicon area.

Redz, meklējot atbildi uz šo jautājumu, apstiprinās dažu spriedelētāju izteikumi pat netu kā pat bezizmēra izgāztuvi. Bet ne par to stāsts.

Tātad - kāds ir par šo pētījis, vai kādam ir, teiksim, links uz kādu inteļa publiskotu doku par tēmu?