High CPU Temps? / Tj max?

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Joey_67

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Jun 24, 2017
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i recently installed a core temp "reader" and it said my 2 cores were hitting a high of 70 degrees celcius which was, i thought, alarmingly high, the cpu load also hit as high as 97 percent. Mind you this is with considerable stress (high specs gaming and lite background ETC mining) on the cpu and gpu. It also said my cpu's Tj. Max is 105 degrees celcius. What is Tj. Max and what does that mean for the high temps of my cpu. My pc is a prebuilt Dell optiplex 980 (kinda old), i added a GTX 1050 ti and a ATI Radeon HD 4550 (very small gpu). I think these could be adding heat to the case and there by to the cpu.

My cpu:
Intel core i5 670 @ 3.47 GHz
(2 multi thread cores)


So should i be concered by these temp and if so what should i do. (I heard about adding thermal paste but i would like to avoid that) thanks for the help!
 
Solution
CompuTronix
Since Intel launched the first Core 2 processors in 2006, almost everyone has been misled by Intel's Tcase Thermal Specification ... you're not the first, and certainly won't be the last.

For everyone's benefit:

(1) Tcase is not Core temperature.
(2) Core temperatures are measured at the heat sources within the Cores.
(3) Tcase is a factory only measurement on the external surface of the Integrated Heat Spreader (IHS).
(4) Tcase is measured and calculated based on processor and cooler Thermal Design Power (TDP).
(5) Tcase is used by manufacturers of cooling solutions, but is a misleading...
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CompuTronix

CompuTronix

Intel Master
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Nov 13, 2006
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Since Intel launched the first Core 2 processors in 2006, almost everyone has been misled by Intel's Tcase Thermal Specification ... you're not the first, and certainly won't be the last.

For everyone's benefit:

(1) Tcase is not Core temperature.
(2) Core temperatures are measured at the heat sources within the Cores.
(3) Tcase is a factory only measurement on the external surface of the Integrated Heat Spreader (IHS).
(4) Tcase is measured and calculated based on processor and cooler Thermal Design Power (TDP).
(5) Tcase is used by manufacturers of cooling solutions, but is a misleading specification for end-users.
(6) Desktop processors all have two Thermal Specifications; Tcase and Tjunction (Tj Max).
(7) Laptops don't have an Integrated Heat Spreader, so they don't have Tcase specifications; only Tj Max.
(8) Tcase is used from Core 2 through Core i 6th Generation processors; Tj Max is used for 7th and 8th.

Tcase has never been the limiting Thermal Specification; it's always been Tj Max.

Regardless, it’s not advisable to run your CPU near the thermal limit, just as you wouldn't run a vehicle with the temperature gauge pegged in the red "hot" zone. If your hottest Core is near it's specified Tj Max Throttle temperature, then your CPU is already too hot.

The consensus among highly experienced and well informed system builders and overclockers, is that cooler is better for ultimate stability, performance and longevity. Experts agree it's prudent to observe a reasonable thermal margin below Tj Max. So regardless of environmental conditions, hardware configurations, workloads or any other variables, Core temperatures above 85°C aren't recommended.

Here's the operating range for Core temperature:

Core temperatures increase and decrease with Ambient temperature.

Idle temperatures below 25°C are generally due to Ambient temperatures below 22°C.

CT :sol:
 
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