Warning: Some i7-6820HKs and i7-6700HQ have Uneven Core Temps due to Uneven Heatsink

Discussion in 'Hardware Components and Aftermarket Upgrades' started by iunlock, Oct 25, 2016.

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Does your 6820HK have cores that are 5c or higher than the others?

  1. Yes, I have a 6820HK that has 1 or more cores with a high temperature differential, greater than 5c.

    14 vote(s)
    9.5%
  2. Yes, I have a 6820HK that has 1 or more cores with a high temperature differential, greater than 10c

    21 vote(s)
    14.2%
  3. Yes, I have a 6820HK that has 1 or more cores with a high temperature differential, greater than 15c

    9 vote(s)
    6.1%
  4. Yes, I have a 6820HK that has 1 or more cores with a high temperature differential, greater than 20c

    23 vote(s)
    15.5%
  5. My 6820HK core temperatures are all tracking the same, with less than 5c difference.

    18 vote(s)
    12.2%
  6. Yes, I have a 6820HK where Core #3 (4th Core) is 10C cooler than the rest.

    1 vote(s)
    0.7%
  7. Yes, I have a 6700HQ that has 1 or more cores with a high temp differential, greater than 5c.

    13 vote(s)
    8.8%
  8. Yes, I have a 6700HQ that has 1 or more cores with a high temp differential, greater than 10c.

    15 vote(s)
    10.1%
  9. Yes, I have a 6700HQ that has 1 or more cores with a high temp differential, greater than 15c.

    10 vote(s)
    6.8%
  10. Yes, I have a 6700HQ that has 1 or more cores with a high temp differential, greater than 20c.

    10 vote(s)
    6.8%
  11. My 6700HQ core temperatures are all tracking the same, with less than 5c difference.

    12 vote(s)
    8.1%
  12. Yes, I have a 6700HQ where Core #3 (4th Core) is 10C cooler than the rest.

    3 vote(s)
    2.0%
  1. plee82

    plee82 Notebook Evangelist

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    Btw new laptop cpu die was a bit scratched already. Seems to be cosmetic but was surprised.
    Wondering if I scratched it while removing the original paste. I guess since it is already a bit scratched IC Diamond will not bother me as much lol.

    Sent from my iPhone using Tapatalk
     
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  2. plee82

    plee82 Notebook Evangelist

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    Had the privilege of removing old k5pro from chokes while replacing paste with Kryonaut. Gotta soak it with alcohol and it peels in one go using the gc extreme spreader. If you do not soak it, dried particles will fall everywhere lol.
     
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  3. hmscott

    hmscott Notebook Nobel Laureate

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    Yup, awesome stuff. It forms a hard barrier to air, keeping it from drying out like normal pastes.

    Still not happy with the re-pastes / fitment of the heatplate? Or was this another device with old K5pro?
     
  4. plee82

    plee82 Notebook Evangelist

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    My gc extreme started to lose performance. Not sure if it was the way I repasted but when I removed the heatsink, I did not notice anything weird. I put Kryonaut today and noticed it is very viscous compared to GC Extreme. GC is almost too creamy and watery. Anyways, out the Kryo and I cannot believe the temps.
     
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  5. plee82

    plee82 Notebook Evangelist

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    Maybe it was the Forza Horizon 3 game hammering the cpu and gpu.


    Sent from my iPhone using Tapatalk
     
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  6. vorob

    vorob Notebook Deity

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    Hello, I'm back with my Acer g9 593 and 6700hq with uneven temps. Quick reminder:

    - I asked Acer to fix this and they've replaced the motherboard with the cooling system. no luck
    - I re-pasted my CPU with arctic silver 5. nothing special happened
    - I lowered CPU voltage and it fixed my issue, it never goes beyond 85C in real applications

    But voltage lowering works only in windows, with working intel app and blah blah blah. I'm looking for a better solution. Any bits of advice? Better thermalpaste (but no liquid metal) maybe I can lay smth between cpu and cooling module?

    My repaste procedure:
     
  7. openglcg

    openglcg Notebook Consultant

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    In my experience arctic silver 5 doesn't provide a huge boost over stock pastes. When i got kryonaut i saw some nice drops in temp. Also paying attention to the thermal pads can help. Sometimes they get torn or even are missing after a tech replaces the heatsink. And getting some high performance pads to replace them can also help temps. More heat transfered to heatsink instead of the inside of of the computer.

    Undervolting with throttlestop is my pref. You have to run it every time but thats good when testing unstable undervolts. Also i found my 6700hq model more locked down in terms of what intel extreme tuning utility would allow (when compared to my 4720hq). Throttlestop let me do things like adjust the clock with the speed shift settings so i dont have to go to windows settings or reboot with xtu to adjust the non turbo speed. I dont even think i can undervolt core and cache independently anymore with xtu. With throttlestop its no problem.
     
  8. Mobius 1

    Mobius 1 what is quality control?

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    Huh, people still use AS5 nowadays?
     
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  9. hmscott

    hmscott Notebook Nobel Laureate

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    Arctic Silver 5 is still for sale everywhere, and lots of people use it :)

    Not everyone is OCD, only about 2.3% World-wide...

    "Approximately 2.3% of the population between ages 18- 54 suffers from OCD, which out ranks mental disorders such as: schizophrenia, bipolar disorder, or panic disorder. In the U.S., approximately 3.3 million people have OCD, of which you have 0.3 to 1% of pediatric population and 2% of adult population."

    For the rest of us a good solid product that's inexpensive and solves the need for thermal paste reliably over 10 years (in 2019) has value.

    I've applied AS5 to computers still running AS5 from 2010, and they never needed re-pasting, didn't pump out - dry out - or otherwise fail.

    That's got value over a few more degree's of performance from products so new the ink isn't dry on their packaging. ;)

    Those new products still need to prove their value over 10 years.

    But, if you are competing against yourself for that last edge in initial temperature drop, there are other alternatives. As it turns out it rarely matters at all, those last few degree's don't make any performance difference.

    BTW, the curing time for AS5 is 200 hours running time, which is pretty long, and results do improve over that time, so be patient when using AS5 :)

    AS5
    http://www.arcticsilver.com/as5.htm

    Important Reminder:
    Due to the unique shape and sizes of the particles in Arctic Silver 5's conductive matrix, it will take a up to 200 hours and several thermal cycles to achieve maximum particle to particle thermal conduction and for the heatsink to CPU interface to reach maximum conductivity. (This period will be longer in a system without a fan on the heatsink or with a low speed fan on the heatsink.) On systems measuring actual internal core temperatures via the CPU's internal diode, the measured temperature will often drop 2C to 5C over this "break-in" period. This break-in will occur during the normal use of the computer as long as the computer is turned off from time to time and the interface is allowed to cool to room temperature. Once the break-in is complete, the computer can be left on if desired.

    AS5 is still viable. :)
     
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  10. Mr. Fox

    Mr. Fox Undefiled BGA-Hating Elitist

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    Soldiers can get by on K-rations for a long time. College students often survive several years on Top Ramen noodles and coffee. Some folks actually like eating the crap served at McDonald's. But, nothing beats a juicy steak, a crisp and refreshing garden salad, grilled veggies and a delicious dessert. I suppose it's hard to miss something better if you never have it.
     
    Last edited: Oct 25, 2017
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