Good Temperature for Core i7 4790k

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Han Xing

Han Xing

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Oct 31, 2014
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Hi guys, I am using core i7 4790k running on 4.4 GHZ
I got
-35c-39c while having firefox running
-62c-68c while playing games such as DMC 5 , Tomb Raider 2013 with everything max out
-93c and is my max temperature
Is it good or bad ?
 
Solution
CompuTronix
Ambient temperature should always be the first variable to be taken into account. Considering your ambient is quite high at 28 to 32C, if we correct it to 22C Standard Ambient, then 95C would becomes 85 to 89 ... which isn't so bad for Prime95.

Ambient is explained in detail in Section 2, and how to correct ambient to standard is explained in Section 12.

CT :sol:
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Han Xing

Han Xing

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so I guess mine is in a good shape, cuz I got 93c only when I do stress test using Intel Xtreme Utility
I am using Brand: Cooler master Seidon 120V
 
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J

juanrdp

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Nov 7, 2012
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From intel specs:
TCASE 74.04°C

http://ark.intel.com/products/80807

If the temp you are measuring is Tcase you are a long shot over the maximun temperature, if is Tjuncion-T Core (Tj is usually 10-15º lower than Tcase) you are still over the maximun not by a lot, but still over it.

Think that at 100º Tj you have severe risk of friying the Cpu.
 
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CompuTronix

CompuTronix

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CompuTronix

CompuTronix

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juanrdp,

Where did you get this piece of misinformation?

Respectfully, this is completely wrong!

Please read this Tom's Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

From the Guide:

" ... Intel desktop processors have thermal sensors for each Core, plus a sensor for the entire processor, so a Dual Core has 3 sensors. Heat originates within the Cores where Digital sensors measure Core temperatures. A single Analog sensor under the Cores measures overall CPU temperature.

Core temperature is 5C higher than CPU temperature due to sensor location. Intel's Thermal Specification is "Tcase", which is CPU temperature, NOT Core Temperature. ... "

Tcase for the i7 4790K is 74C. Tcase + 5 makes the Core temperature 79C.

4th Generation 22 Nanometer: 4790K (TDP 88W / Idle 2W)

Standard Ambient = 22C
Tcase (CPU temp) = 74C
CPU / Core offset + 5C
Tjunction (Core temp) = 79C
Tj Max (Throttle temp) = 100C

At Standard Ambient 22C, here's the typical operating range:

80C Hot
70C Warm (Heavy Load)
60C Norm
50C Norm (Medium Load)
40C Norm
30C Cool (Idle)


CT :sol:
 
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Han Xing

Han Xing

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Actually, I was running benchmarking on intel Xtreme Tuning Utility and it says my highest temperature is 93c ,is it bad ? or benchmarking doesn't prove anything ?
and yeah, I live in cambodia, a very warm country, my room temperature is around 28c-32c
I don't know much about Prime95 so I run the FFT stress test and my CPU pakage temp is like 95c...
 
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CompuTronix

CompuTronix

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Ambient temperature should always be the first variable to be taken into account. Considering your ambient is quite high at 28 to 32C, if we correct it to 22C Standard Ambient, then 95C would becomes 85 to 89 ... which isn't so bad for Prime95.

Ambient is explained in detail in Section 2, and how to correct ambient to standard is explained in Section 12.

CT :sol:
 
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Solution
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juanrdp

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If the maximum temperature allowed at the processor is following intel specs 74.04°C (Tcase) could you explain me how the core throttle temp could be 100º if the temp at the core that throtle as you said is only +5º?

Following that chart the processor will begin to throttle with 95º in the processor, 20º over the maximun temperature allowed.

But well, maybe myself or the intel specs at their web page are not corret.

 
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CompuTronix

CompuTronix

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juanrdp,

We haven't heard back from you:



juanrdp,

I'd really like to know where you got this piece of misinformation?

We want our readers to have the most accurate information that we can provide for them. Processor temperatures are one of the most confusing, frustrating and misunderstood topics on our Forums here at Tom's, as well as on other computer enthusiast websites.

Unfortunately, Intel's Thermal Specification are not written for the average person to understand very well. Further, Intel's Thermal Specifications do not provide a "big picture" so that users can connect the dots, and make sense out of all the names and terms we see being tossed around.

Intel doesn't provide a perspective of how terms such as Ambient temperature, Tcase, CPU temperature, Package temperature, Tjuntion, Core temperature and TjMax actually relate to one another. They have no link to click on which helps people to make sense of it shown all in a single loacation.

It's as if their Thermal Specifications were written by engineers, then edited by lawyers. The specs lack connectivity and continuity between the terms and definitions. But regardless, once misinformation proliferates throughout the community, it's very difficult to chase it down and correct it.

So to all who read this, if you're not sure, then find out before you put it out!

Thanks,

CT :sol:
 
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CompuTronix

CompuTronix

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juanrdp,



That's correct.

Let me put it a different way ... Tcase (CPU Temperature) follows Tjunction (Core Temperature) by 5C ... as it increases under 100% workload ... even it rises all the way to TjMax at 100C.

If CPU temperature is 74C, then Core temperature is 79C.
If CPU temperature is 84C, then Core temperature is 89C.
If CPU temperature is 94C, then Core temperature is 99C.

Does that help?
 
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4Ryan6

4Ryan6

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I see you've edited and added to your guide CT, Excellent! :) Ry

 
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4Ryan6

4Ryan6

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The thread you linked has some valuable information in it which backs up some information I was sharing with the forum regarding how overclocking the memory effects the processor top end limits and it seems it has a definite effect on the 4790K.

Also Intels DDR3 slot voltage specification which is 1.50v for that CPU also has an overclocking effect as well as the memory controller is also on the CPU, which means memory speed increase requiring DDR3 slot voltage above 1.50v is adding additional heat.

Hopefully this quote from the thread will help get my point across. (The whole post is quoted but the information I'm referring to is bolder)

I have received the new mobo and old CPU back from Scan and the CPU is still overheating just as it ever was.

I was at a loss to understand how this could happen so I experimented with the memory settings as these were one of the things which may have been different at Scan's end, the results were significant,

-With memory at 1333 and 1.5v the AIDA test could be run with stock Intel HS and no thermal throttling, CPU temps reaching a maximum of 94°C.

-With memory at 1600 and 1.5v the AIDA test could not be run with stock Intel HS without thermal throttling. 17%

-With memory at 1333 and 1.65v the AIDA test could not be run with stock Intel HS without thermal throttling. 3%

-With memory at 2400 and 1.65v (XMP) the AIDA test could not be run with stock Intel HS without thermal throttling. 17%

Since Intel's memory specification for the CPU is 1333/1600, technically speaking, it still seems to be overheating.
Click to expand...

Here's my 2 cents on this thread, if anyone wants to overclock any processor successfully there are certain requirements you cannot get around.

#1 Knowing the thermal specifications of the CPU you are intending overclocking.
#2 Having the CPU cooling that will allow the overclock you desire to reach.
#3 Having the overclocking knowledge to get there.

If you have mastered and secured these 3 things, you are aware of what hardware to even buy to be able to reach your goals.

Additionally it helps to see where other overclockers have reached, and what cooling got them there!

http://lab501.net/intel-core-i7-4790k-intel-pentium-g3258-overclocking-study/

Plus a basic knowledge of what to expect from air or water cooling.

http://www.tomshardware.com/forum/id-2196038/air-cooling-water-cooling-things.html

Even though the link below covers DeltaT in water cooling it has valuable information in it.

http://www.overclockers.com/guide-deltat-water-cooling/

One last thing the case and airflow is very important, if you're trying to cram it all in some tiny case, you are limiting your CPU cooling options from the git go. You may do a fantastic job of getting it all crammed in there, but you are also seriously limiting any possible overclocking at the same time.

My 2 cents! Ryan



 
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