I7 47090K Too hot. The complete question.

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pmurad

pmurad

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Main PC Specs:
Intel Core i7 4790K @ 4.00GHz
Z97X-SOC Force
16 Gb Ram.

Hello my friends, I see a lot of threads talking about the temperature of Intel I7 4790K. It seems this processor is too hot and needs special cares.
My busy temperature is around 75C (stress test) when Idle 30~50C.
And yours?
What’s the normal temperature for this processor?

The core's temperature (Stress test OCCT):

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I’ve read people telling about the voltage from mobo. I updated the mobo and and have no idea what’s exactly is the voltage thing. Here’s a overview about the mobo. I read people telling that my processor/mobo should operate at 1.18v. So what do I need to change?

SIBfL48.png



My case is closed and has 2 fans + watercooler. In the manual they asked to install the radiator on the top but didn’t tell anything about the fan’s radiator. I put in the top, first with intake air (what is wrong) after outtake. It seems the performance got better when I installed in the side wall and removed one random fan that came with the tower (I had no success to change the fan place).
I’m not sure what to do, can you help me?

 
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pmurad

pmurad

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Your guid absolutelly fantastic. Sadly it's too much technical for me and my english is not so good. Can you be straight to me? Like: change that, do that... I'm completely lost.

Please bud!
 
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CompuTronix

CompuTronix

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pmurad,

Sorry to be the one to say this, :(but there are many air coolers better than the H55. You might want to consider upgrading to a more capable cooler, whether big air or another closed loop liquid cooler. It all depends on your case and budget.

CT :sol:
 
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pmurad

pmurad

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Can you suggest the right one for my system?
 
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pmurad

pmurad

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CompuTronix

CompuTronix

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Now you have some valid thermal benchmarks.

Since your ambient is 28C, and Standard Ambient is 22C which is the reference for thermal specifications, then your corrected load temperatures would be: 84 84 85 79

Core temperatures in the mid-70's are safe for everyday real-world workloads.

Does this seem realistic for your computer?

 
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pmurad

pmurad

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The ambient is 28. It's summer. I did the test with the case opened. The high was 95, so is there something wrong, right?
Should I get a new cooler?
 
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pmurad

pmurad

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The maximum was 60c, should I get a h100i? Corsair

Give me your sincere opinion, I got a artic silver, is still shipping
 
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CompuTronix

CompuTronix

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If you are satisfied with your processor's performance and do not intend to overclock higher, then since your normal operations don't push your core temperatures into the mid-70's, I would conclude that you are OK.

If you do intend to push for a higher overclock, then an H100i would be recommended.

CT :sol:
 
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pmurad

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I don't intend to overclock but I intend to close the case and put in a small place and closed place . The gpu I use is very hot (zotac gtx 970) and it's under the cpu, I believe it's making the tower warmer BTW.

I believe I must get this cooler, do you know if it's pretty decent?
 
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pmurad

pmurad

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Friend,

I've done several tests, with prime95, Aida64 and the Intel extreme tunning utility.

Prime gives me a CPU with 86c and aida and extreme tunning it stays below 70, maximum 74/75. I read the prime95 last version is problematic and I don't know if I should trust it.

Do you think I must RMA? It seems a very odd behaviour, btw I ordered corsair h110 already for the processor...

what do you think?
 
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CompuTronix

CompuTronix

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pmurad,

Concerning Prime95, the latest version (28.5) is problematic. I already addressed this problem above in my 3rd post where I gave you the link for version 26.6, which we've already used to run a test ... correct, yes?

"Now you have some valid thermal benchmarks.

Since your ambient is 28C, and Standard Ambient is 22C which is the reference for thermal specifications, then your corrected load temperatures would be: 84 84 85 79

Core temperatures in the mid-70's are safe for everyday real-world workloads."

Are we on the same page here?

From my Temperature Guide:

Section 12 - Thermal Testing @ 100% Workload

Prime95 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload. This is the test that Real Temp uses to test sensors. The link above is to version 26.6, which is well suited to all Core 2 and Core i variants.

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95 run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the software utility AIDA64 shows the same results.

It's not necessary to run AVX code for thermal testing. Prime95 v26.6 produces temperatures on 3rd and 4th Generation processors more consistent with 2nd Generation, which also have AVX instructions, but do not suffer from thermal extremes due to having a soldered Integrated Heat Spreader and a 35% larger Die.

Prime95's default test, Blend, is a cyclic workload for testing memory stability, and Large FFT's combines CPU and memory tests. As such, Blend and Large FFT's both have cyclic workloads which are unsuitable for CPU thermal testing.

Other stability tests such as Linpack and Intel Burn Test have cycles that load all registers with all one's, which is equivalent to a 110% workload, and are also unsuitable for CPU thermal testing. The software utility OCCT runs elements of Linpack and Prime95.

Shown above from left to right: Small FFT's, Blend, Linpack and Intel Burn Test.

Notice the steady-state thermal signatures of Small FFT's, which allows accurate measurements of Core temperatures.

Shown above from left to right: Small FFT's, Intel Extreme Tuning Utility CPU Test, and AIDA64 CPU Test.

The "Charts" in SpeedFan span 13 minutes, and show how each test creates different thermal signatures. Intel Extreme Tuning Utility is also a cyclic workload. Although AIDA64's CPU test is steady-state, the workload is insufficient, and it's not available as freeware.

This final statement above addresses your comments regarding AIDA64.

No, you don't need to RMA. Yes, an H110i is a decent closed loop liquid cooler, but as you said that you intend to "close the case and put in a small and closed place", even the very best cooler won't work very well because the ambient temperature will increase to very high levels due to a lack of adequate ventilation.

You need to rethink this.

Also, concerning your graphics card:

"* Axial flow graphics cards recirculate heat. Linear flow cards exhaust heat from the case.

Examples:

Axial - http://www.newegg.com/Product/Product.aspx?Item=N82E16814130953
Linear - http://www.newegg.com/Product/Product.aspx?Item=N82E16814130934

* A hot case stresses hard drives, memory, chipsets, voltage regulators and power supply.
* If your case doesn't breath well, then perhaps it's time to upgrade to one that does.
* High performance computers need unrestricted airflow in and out, so location is critical."

CT :sol:
 
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