Are these temperatures normal?

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ezikmezik

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Dec 23, 2014
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I overclocked my i7 4770k @ 4.4Ghz with 1.27V, the chip is cooled by a noctua NH-D15, while running intel burn test on high the CPU hits 90C, I already reseated the cooler once, cleaned the old paste thoroughly and put new thermal compound (Arctic MX-4) using the dot method.
Are these temperatures normal for a D15?
 
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CompuTronix

CompuTronix

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Nov 13, 2006
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ezikmezik,

Welcome to Tom's! :D

First things first; please read the Forum Rules: Read First: Forum Rules & Styling Posts - http://www.tomshardware.com/forum/id-2083478/read-forum-rules-styling-posts.html

Now, concerning your question, I can't say just yet without first knowing your ambient temperature, but 90C is hot.

However, it is typical for some of the popular stress testing utilities like Intel Burn Test (not written by Intel) to exceed Intel's Thermal Specifications.

Your Vcore is OK, which should not exceed 1.300.

Standard ambient is 22C, which is the reference for Intel's Thermal Specifications. Here's the specs page for your i7 4770K - http://ark.intel.com/products/75123/Intel-Core-i7-4770K-Processor-8M-Cache-up-to-3_90-GHz

Intel's Thermal Specification is "Tcase", which is CPU temperature, not Core Temperature. Core temperature is 5C higher than CPU temperature due to sensor location. Tcase for your i7 4770K is 72C. Tcase + 5 makes the corresponding Core temperature 77C.

Here's how the specs look when you put them all together:

Standard Ambient = 22C
Tcase (CPU temp) = 72C
CPU / Core offset + 5C
Tjunction (Core temp) = 77C
Tj Max (Throttle temp) = 100C

Mid-70's are fine for everyday real-world workloads, and low 80's are OK for limited time intervals while stress testing.

Please post your ambient temperature so we know where your reference point is at.

Also, please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

If you already have a later version such as 28.5, do not use it! It will cause extreme core temperatures due to AVX code. Use only version 26.6.

Run Small FFT's for 10 minutes, then let's see where your core temperatures come in.

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

Thanks,

CT :sol:
 
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ezikmezik

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Dec 23, 2014
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Ambient temps are about 20C around here, I ran prime95 v26.6 like you told me and temperatures didn't exceed a max of 83C with an average of 72-73C, it ran for 12 hours straight with 0 errors and blue screens, should I consider my OC stable?
IBT really does fry my CPU.

 
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CompuTronix

CompuTronix

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That's a 10C spread.

The default test, "Blend", is a fluctuating workload for testing memory stability, which yields fluctuating temperatures. Small FFT's is a "steady-state" workload for testing processor temperatures and stability, which yields steady temperatures.

Are you sure that you ran small FFT's?
 
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ezikmezik

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Dec 23, 2014
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Well my bad, I ran the blend test first.
Small FFT's has now been running for 2 hours and the CPU is keeping a constant 79-81C across all cores.
There's one weird thing I haven't noticed before though, although I've set the voltage to 1.270V, CPU-Z has been showing me a core voltage of 1.296V during testing, should I be concerned about that?
I'll keep the PC running small FFT's through the night and see if I get any blue screens.

 
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ezikmezik

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Is 80C a reasonable temperature with this test then?
 
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