5930K High Temperatures

[jukesie]

Hi all,

I've recently built a new system and I have a question regarding temps of the processor.

I bought the HyperEvo cooler for my CPU and I did find that it was a little loose when fitted. I searched online and found many others had the same experience but they all agreed that it was fine as it was, so I continued.

My idle temps for the 5930k (no oc) is around 50C which I know is probably too hot, but I was first alerted to this issue when running Handbrake. My CPU temps then hit around 90-95C. (measured with Real Temp and HWMonitor)

My question is simple then, are these temps too hot or normal and i'm just worrying over nothing?

I figure I will have to replace the Evo but I wasn't expecting to have to do it so soon.

Thanks for taking the time to read through this.

 

[laviniuc]

too hot... being too lose i'd guess something is wrong with how you assembled it...

 

[jukesie]

It's not how I assembled it, unless tons of other people out there did the same thing. I tried to get it tighter, but there was simply no way it would.

 

[laviniuc]

how fast does it reach those 90's temps?

 

[jukesie]

Almost immediately. After perhaps 10 seconds. Once Handbrake starts an encode the load goes to about 98%, and the temps follow.

I think I might have to go for the H100i, and just say hell with it.

 

[VicVega1]

Way too hot. I have an Evo and it is a bit loose as well (just a bit, shouldn't be wobbly or sth like that).
Things that come to my mind:
1. Are you shure you assebled everything correctly?
2. Did you get rid of the old thermal compound from the CPU?
3. Did you put new thermal compound/ if so - did you put enough?
4. Is the fan working? If so at what RPM?
5. Is the fan mounted properly (blowing air throug the heatsink towards a outtake case fan)?

 

[CompuTronix]

jukesie,

The i7 5930K is a 140 watt processor out of the box, and more when overclocked. Although the 212 EVO does a fair job on 84 and 88 watt quad core i5's and i7's, it's really not adequate for your 6 core / 12 thread processor.

Intel desktop processors have thermal sensors for each Core, plus a sensor for the entire processor, so a Hex Core has seven 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 your i7 5930K is 66C - http://ark.intel.com/products/82931/Intel-Core-i7-5930K-Processor-15M-Cache-up-to-3_70-GHz

Tcase + 5 makes the corresponding Core temperature 71C. The relationship between Core temperature and CPU temperature is not in the Thermal Specifications; it's only found in a few engineering documents.

The relationships between Ambient temperature, CPU temperatures, Core temperatures and Throttle temperatures are shown below for you Hex Core processor. All values are based on Intel documentation.

High End 22 Nanometer: 5930K (TDP 140W / Idle 2W)

Standard Ambient = 22C
Tcase (CPU temp) = 66C
CPU / Core offset + 5C
Tjunction (Core temp) = 71C
Tj Max (Throttle temp) = 100C

Standard Ambient temperature is 22C, which is normal room temperature, and is the reference value for Intel’s Thermal Specifications. Knowing your Ambient temperature is important because Ambient directly affects all computer temperatures.

What is your ambient temperature?

Also, Handbrake runs AVX code.

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. When AVX code runs on the Floating Point Unit (FPU) math coprocessor, it causes extremely high temperatures. Prime95 versions later than 26.6 and the FPU test in AIDA64 have the same results.

Thanks,

CT

 

[jukesie]

Way too hot. I have an Evo and it is a bit loose as well (just a bit, shouldn't be wobbly or sth like that).
Things that come to my mind:
1. Are you shure you assebled everything correctly?
2. Did you get rid of the old thermal compound from the CPU?
3. Did you put new thermal compound/ if so - did you put enough?
4. Is the fan working? If so at what RPM?
5. Is the fan mounted properly (blowing air throug the heatsink towards a outtake case fan)?

I will try to answer everything you asked.
1. Yes I am sure I assembled it correctly. I don't mean it rattles, but it's not tightly against the CPU. More like resting on it.
2. It was a brand new build so the thermal compound I applied was brand new and NOT the one supplied with the CPU.
3. Whether I put enough on is up for debate. I covered the back of the CPU, I put on the same i've put on with every build i've done. So couldn't confirm or deny that one.
4. It's working and running at 680RPM according to HWmonitor.
5. It is blowing through the heatsink, but the fan is the stock fan that came with it. I have seven fans in my build, not including the CPU fan. I could mount a second fan to "pull" on the other side. But I don't think that will add too much to the solution

 

[jukesie]

jukesie,

The i7 5930K is a 140 watt processor out of the box, and more when overclocked. Although the 212 EVO does a fair job on 84 and 88 watt quad core i5's and i7's, it's really not adequate for your 6 core / 12 thread processor.

Intel desktop processors have thermal sensors for each Core, plus a sensor for the entire processor, so a Hex Core has seven 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 your i7 5930K is 66C. Tcase + 5 makes the corresponding Core temperature 71C.

The relationship between Core temperature and CPU temperature is not in the Thermal Specifications; it's only found in a few engineering documents.

The relationships between Ambient temperature, CPU temperatures, Core temperatures and Throttle temperatures are shown below for you Hex Core processor. All values are based on Intel documentation.

High End 22 Nanometer: 5930K (TDP 140W / Idle 2W)

Standard Ambient = 22C
Tcase (CPU temp) = 66C
CPU / Core offset + 5C
Tjunction (Core temp) = 71C
Tj Max (Throttle temp) = 100C

Standard Ambient temperature is 22C, which is normal room temperature, and is the reference value for Intel’s Thermal Specifications. Knowing your Ambient temperature is important because Ambient directly affects all computer temperatures.

What is your ambient temperature?

Also, Handbrake runs AVX code.

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. When AVX code runs on the Floating Point Unit (FPU) math coprocessor, it causes extremely high temperatures. Prime95 versions later than 26.6 and the FPU test in AIDA64 have the same results.

Thanks,

CT

Thank you for such a detailed answer. I've seen these posts online today, and although i've read through many, I won't say I understood everything I read.

I have no overclocking in my entire build for the moment as I mentioned before, so even more reason why I was concerned.

I am running 2-way SLI but again my GPU temps are low, so I don't see that even contributing slightly.

My ambient temp is probably around 22C I can't imagine it being more than that, though i don't have a thermomiter handy right now.

I know that when encoding videos and rendering, it puts the CPU under heavy load, and common sense tells me that the temps will rise. I've also read that some users have had high temps and they were told that it wasn't something to worry about. So I am a little at a loss. However I do understand that the likelihood is that these temps are far too high. So I need to get something done.

 

[CompuTronix]

Are your graphics cards axial flow or linear flow?

* 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

* Axial cards work well with a liquid cooled CPU. Linear cards work well with an air cooled CPU.

 

[jukesie]

Are your graphics cards axial flow or linear flow?

* 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

* Axial cards work well with a liquid cooled CPU. Linear cards work well with an air cooled CPU.

Then I believe that they are Axial flow, I.E. they exhaust their heat into the case.

GTX970 WF3

I am running a Prime95 right now and the cards are at 47C (main) and 30C (secondary) so they seem perfectly within tolerance, no?

 

[jukesie]

As an addition. Prime95 has been running for over 10 minutes now and everything is saying "Self-test XXXk passed"

I honestly don't know what it all means, but it seems to all be fine

 

[CompuTronix]

Which version of Prime95 are you running?

 

[jukesie]

It was the latest from the website for Windows 7 64. v285

 

[CompuTronix]

Do NOT run any versions of Prime95 later than 26.6. Here's why:

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95, such as 28.5, 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.

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.

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

Run only Small FFT’s for 10 minutes.

Use only Real Temp to measure your Core temperatures, as it was designed specifically for Intel processors: Real Temp - http://www.techpowerup.com/downloads/2089/real-temp-3-70/

Your Core temperatures will test 10 to 20C lower with v26.6 than with v28.5.

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

Thanks,

CT

 

[jukesie]

The processor was running at 99% 3000Mhz, which is less than max. Core temps were maxed at 92C after 13mins of Small FFT

I had read your post before, but I admit I didn't follow on to the "testing" portion

 

[CompuTronix]

So are you saying that your temperatures are still in the 90's with Prime95 v26.6 Small FFT's?

 

[jukesie]

Yes while running those tests the temps were in the 92C range.

Now at idle back to 42-45C

Do you think that cleaning the processor and applying fresh thermal compound, and making sure there's plenty of it, then reapplying the heatsink will change anything? Or do you think, like I was fearful of when I bought it, that the hyperevo just isn't up to cooling this processor and rig down enough.

 

[CompuTronix]

Then that proves there's definitely a problem with your cooler. Too much thermal compound can act as an insulator.

Here's a helpful link:

Thermal Paste Comparison, Part One: Applying Grease And More - http://www.tomshardware.com/reviews/thermal-paste-heat-sink-heat-spreader,3600.html

 

[jukesie]

Ok. So as you are the obvious person to ask. Do you think that getting the Corsair H110 is a good idea, or would you recommend something else?

I did look for the Swiftech 220X but I can't get that in the UK.

 

[CompuTronix]

Yes, but let's first deal with the immediate problem. Please read the link above.

 

[laviniuc]

ok, the fan should spin at 2000rpm when the cpu reaches 90's. if it does not, something isn't working as it should. (this is how a cooler unable to cope with the cpu should behave). from what i read, this is not the case.

 

[Bafioo]

Yes while running those tests the temps were in the 92C range.

Now at idle back to 42-45C

Do you think that cleaning the processor and applying fresh thermal compound, and making sure there's plenty of it, then reapplying the heatsink will change anything? Or do you think, like I was fearful of when I bought it, that the hyperevo just isn't up to cooling this processor and rig down enough.

Hmm, CompuTronix is totally right, altrought. i have some other advice.

First: Get a new Cooler, like. a Noctua? a top notch one, the dh-14/15 or a liquid one(The all in one)
Second: Apply thermal paste as a dot, like this picture: http://www.online-tech-tips.com/wp-content/uploads/2010/06/ThermalCompoundApplied.png
and DON'T spread it with hands or nothing else, it could make Air Bubble. Use the pressure from the Cooler to do so, wich mean apply the Thermal paste as above and mount the Cooler.
Third: If temps keeps this way... well, your case has some problems, also be sure if you get those top notch Air Cooler to have enough room to fit the cooler, even if i think you should have enough since you do run a Sli at those low temperature.

EDIT: Small question, since that could be a possible problem or mistake of yours, did you put the fan cable into the "CPU FAN" pin? Or did you connected it to the System fan pin?

 

[CompuTronix]

ok, the fan should spin at 2000rpm when the cpu reaches 90's. if it does not, something isn't working as it should.

The fan should be at 100% RPM at 75C.

Thermal testing should be performed with your computer clear of desk enclosures or items that block airflow. Covers should be removed and all fans and circulating pump (if equipped with liquid cooling) at 100% RPM, so temperatures can be tested under ideal conditions.

After at least 10 minutes at 100% workload, replace the covers. While still at load, if the Core temperatures increase by more than a degree or two, then your case has an air flow problem.

 

[Bafioo]

ok, the fan should spin at 2000rpm when the cpu reaches 90's. if it does not, something isn't working as it should.

The fan should be at 100% RPM at 75C.

Testing should be performed with your computer clear of desk enclosures or items that block airflow. Covers should be removed and all fans and circulating pump (if equipped with liquid cooling) at 100% RPM, so temperatures can be tested under ideal conditions.

After 10 at least minutes at 100% workload, replace the covers. While still at load, if the Core temperatures increase by more than a degree or two, then your case has an air flow problem.

The fact he's not talking about Fan and RPM of those fans makes me think of a mistake in pin connectors, or even worse a faulty motherboard sensor.