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    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.

  1. hmscott

    hmscott Notebook Nobel Laureate

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    Correct size? :)

    The "correct size" is what it was made with, obviously not correct, or something else is impeding the even pressure across the heatplate.

    He'll know what to do when he sees it, it'll take some eyeballing and thought to figure it out, but it should be obvious.

    K5 Pro can be used instead of thermal pads, but maybe not for that gap.

    If it looks like the pads are too thick, carefully remove one and take it with you to compare against other pads, or get it measured accurately and buy a couple of sizes smaller via online order.

    Hopefully it won't take too many tries :)
     
    hmscott, Jul 18, 2017
    #1051
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  2. plee82

    plee82 Notebook Evangelist

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    [​IMG]

    Removing and checking again.


    Sent from my iPhone using Tapatalk
     
    plee82, Jul 18, 2017
    #1052
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  3. hmscott

    hmscott Notebook Nobel Laureate

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    So the bottom part of the photo is the CPU, right? What is that over the "can" to the Right of the CPU, is that a pad?

    Does that "jack up" that side of the heatplate when you push it down onto the CPU area?

    Look edgewise across the motherboard, across the CPU and see what is higher than the CPU - what would lift the heatplate higher than the CPU - causing lower pressure or contact on that side of the CPU.

    And, look at the bottom of the heat plate edge on and make sure it is flat, not warped or unlevel at the point it touches the CPU.

    That's what you need to find, what is lifting an edge of the CPU contact reducing contact pressure and therefore thermal transfer.
     
    hmscott, Jul 18, 2017
    #1053
  4. Falkentyne

    Falkentyne Notebook Prophet

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    You have WAY Too much paste on that CPU and GPU!!
     
    Falkentyne, Jul 18, 2017
    #1054
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  5. plee82

    plee82 Notebook Evangelist

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    On purpose when I did it my last time.


    Sent from my iPhone using Tapatalk
     
    plee82, Jul 18, 2017
    #1055
  6. plee82

    plee82 Notebook Evangelist

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    Definitely lifting higher than cpu. Pad is 0.5mm
     
    plee82, Jul 18, 2017
    #1056
  7. hmscott

    hmscott Notebook Nobel Laureate

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    Sooo, it would be good to pull that pad and replace it with the paste you have for now.

    I can't tell from the picture, but if you use a sharp xacto type knife you should be able to remove that pad without damage.

    That way you can see if the core temperature differential drops, and then you know that's the problem to work on, or replace the pad if there is no difference.

    If removing the pad changed the core temperature differential, order a thinner pad - maybe get K5 Pro instead - that thick stuff used to replace pads.
     
    Last edited: Jul 18, 2017
    hmscott, Jul 18, 2017
    #1057
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  8. plee82

    plee82 Notebook Evangelist

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    What a pain lol. Maybe I should go for the GT72 or 73.


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    plee82, Jul 18, 2017
    #1058
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  9. plee82

    plee82 Notebook Evangelist

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    Anyways just repasted and closed, tired of this. Put a thin layer this time. 7-8C difference in prime.


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    plee82, Jul 18, 2017
    #1059
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  10. plee82

    plee82 Notebook Evangelist

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    Only good thing is my fan rattling stopped, I guess it just needed screw adjustment lol. Prime95 small fft, 20 minutes auto fan, 76C.


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    plee82, Jul 18, 2017
    #1060
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  11. hmscott

    hmscott Notebook Nobel Laureate

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    76c on all 4 cores? Is the core temperature differential gone now?
     
    hmscott, Jul 18, 2017
    #1061
  12. plee82

    plee82 Notebook Evangelist

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    occt2.png occt1.png

    Now running OOCT. Auto fan.
     
    plee82, Jul 18, 2017
    #1062
  13. plee82

    plee82 Notebook Evangelist

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    Kinda funny and sad but if I did not have this type of knowledge I would be happily using my laptop without any issues because it does not throttle in any games.


    Sent from my iPhone using Tapatalk
     
    plee82, Jul 18, 2017
    #1063
  14. plee82

    plee82 Notebook Evangelist

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    30 Minutes OCCT Small data set and auto fan. 7C difference.

    occt3.png
     
    plee82, Jul 18, 2017
    #1064
  15. hmscott

    hmscott Notebook Nobel Laureate

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    Then don't worry about it, and enjoy gaming :)

    Or, work out the situation with this model.

    Or, return it and get something else.

    You are involved with trying to work a solution on your own, consider it a side quest and complete it by finding and working around the elements lifting the heatplate and keeping it from seating evenly against the CPU.

    Then you will have won a great battle with your laptop, which many people don't have knowledge about either ;)
     
    hmscott, Jul 18, 2017
    #1065
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  16. plee82

    plee82 Notebook Evangelist

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    I am wondering, is a copper shim on top of the cpu die effective?

    Anyways, thought about k5 pro but the mess it makes lol, imagine cleaning that every time you need to repaste. Has anybody anybody in this forum used it?


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    plee82, Jul 18, 2017
    #1066
  17. plee82

    plee82 Notebook Evangelist

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    Wait a minute, am I missing one of those squares thing next to the CPU? I see two and there is an empty spot in there lol. Any other gt62vr 6re user can confirm this?
     
    plee82, Jul 18, 2017
    #1067
  18. hmscott

    hmscott Notebook Nobel Laureate

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    K5 Pro is easy to take off :)

    Not like Liquid Metal that has oxidized and stains the IHS - not a problem for laptop CPU's without an IHS.

    No more messy than the photo's show of your over use of paste, it just wipes off.

    Or peals off if set long enough.

    You could use a shim to lift the heatplate high enough to balance the effect of the too high thermal pad, but then you'd probably lift it high enough to make other parts making contact with the heatplate stop making contact with the heat plate, and that may be a much worse thermal problem leading to part failure.

    If that pad on that part next to the CPU is the culprit, you are fortunate to have found it, as it has 2 easy and quite normal remedies, either get a thinner pad, or use K5 Pro thick paste to solve the mounting problem.

    That's as easy as it gets :)
     
    hmscott, Jul 18, 2017
    #1068
  19. hmscott

    hmscott Notebook Nobel Laureate

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    Don't distract yourself with such musings, it's not missing parts o_O
     
    hmscott, Jul 18, 2017
    #1069
  20. plee82

    plee82 Notebook Evangelist

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    Next to that square thermal pad there is another long thermal pad 1mm thick. I am thinking about replacing the 1mm to 0.5mm and then replacing the 0.5mm with k5 pro or something even thinner (if that even exists). This will return me 0.5mm worth if gap back to the cpu right side.
     
    Last edited: Jul 18, 2017
    plee82, Jul 18, 2017
    #1070
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  21. plee82

    plee82 Notebook Evangelist

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    Edit: nvm still thinking.
     
    Last edited: Jul 18, 2017
    plee82, Jul 18, 2017
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  22. plee82

    plee82 Notebook Evangelist

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    @hmscott please tell me I am not crazy for going for this lol I hope 0.5mm makes a diff. Worst case I go k5 pro for all pads in the right side of the cpu. Already ordered the 0.5mm pad (artic) and k5 pro. Going to do this on Thursday (prime ftw)


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    plee82, Jul 18, 2017
    #1072
  23. hmscott

    hmscott Notebook Nobel Laureate

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    Well, it's up to you, many people wouldn't have gotten this far, continually questioning themselves out of pursing it until they gave up :)

    If you solve the problem, it'll will be worth it in the classical sense, you saw, you learned, you conquered, and now you can feast on the beast - gaming for years of enjoyment.

    If you fail, I hope you realize that it's just the way it works out sometimes - it takes a lot of experience ( failures / successes ), patience, persistence, and skill to solve these kind of problems - and even more experience to know when it's a lost cause and time to cut your losses.

    I don't think you are there yet :)

    You have found the core temperature differential, found the "high point(s)" keeping contact from happening (there may be more or higher points), and have some previously successful (in other situations) remedies to try.

    Sometimes there is no easy fix like this, sometimes you have to "grind" metal to remove impediments to firmly seating the heatplate, or it's impossible to fix things with the materials of the build as designed and supplied - that may be a possible outcome.

    I've helped a lot of people through predominantly more successes than failures, and I like to think those that have been successful have gone on to help others too.

    I think there is a good chance for success, so I'd say you aren't crazy, and can otherwise follow your interests where they take you :)
     
    Last edited: Jul 18, 2017
    hmscott, Jul 18, 2017
    #1073
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  24. plee82

    plee82 Notebook Evangelist

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    The unevenness can be visually be checked just by looking down the HS when it is on the die. It is not horizontal, there is a slight angle. I will be happy if this brings it to at least 5C differential.
     
    plee82, Jul 18, 2017
    #1074
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  25. Papusan

    Papusan Jokebook's Sucks! Dont waste your $$$ on Filthy

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    You could also probably use pads of same high if you can find some very soft (depends if the pads you already use is hard). Take a look in the Paste/Pads Roundup Guide
    Try with minimal paste (thin, 3/4 long line with paste). Then tighten the screws, then loosen the screws, and take a look.
    Edit. I use very thin medical gel (Basiron :D) for pressure testing. Work wonders.
     
    Last edited: Jul 19, 2017
    Papusan, Jul 19, 2017
    #1075
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  26. plee82

    plee82 Notebook Evangelist

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    I guess I hit the jackpot since I got the Artic thermal pad lol. Should be softer than what I have. The oem one is kinda hard.


    Sent from my iPhone using Tapatalk
     
    plee82, Jul 19, 2017
    #1076
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  27. Aman Krishna

    Aman Krishna Notebook Enthusiast

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    Super helpful links...thanks @Papusan

    Sent from my Moto G (4) using Tapatalk
     
    Aman Krishna, Jul 19, 2017
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  28. plee82

    plee82 Notebook Evangelist

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    What are those big squares called next to the cpu? Also the black little squares to the right if the big squares? Thanks!!
     
    plee82, Jul 19, 2017
    #1078
  29. plee82

    plee82 Notebook Evangelist

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    Wow this looks like a similar issue that AW had with the thick pad lol. Maybe there is a chance my fix works tomorrow!


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    plee82, Jul 19, 2017
    #1079
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  30. hmscott

    hmscott Notebook Nobel Laureate

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    Yes, I thought you already knew that by being in and reading this thread :)

    Good luck!!
     
    hmscott, Jul 19, 2017
    #1080
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  31. plee82

    plee82 Notebook Evangelist

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    Yea I did not realize it was the same squares thing lol.
     
    plee82, Jul 19, 2017
    #1081
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  32. plee82

    plee82 Notebook Evangelist

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    I swear my next laptop is going to be a LGA ;). Probably in a couple of years. This laptop is giving me excellent performance in Overwatch Epic settings though so it will last a few years.


    Sent from my iPhone using Tapatalk
     
    plee82, Jul 19, 2017
    #1082
  33. hmscott

    hmscott Notebook Nobel Laureate

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    The LGA laptops have their own peculiar problems :)

    You want to delid the CPU (remove the IHS) and replace the "toothpaste" TIM, which has it's own pucker factor.

    Then the Clevo heatplates have a history of being poor fitting (warped), and can warp when over heated.

    Then there's the higher level of thermal output of LGA (95w) compared to BGA (45w), which requires beefier cooling components (weight) and larger faster fans (noise).

    Design problems, BIOS limitations that need the loving care of @Prema - which means you can't just buy from anywhere as his BIOS fixes are only available from participating dealers - and it can take 6-8 months or more from release before those fixes are available.

    There are plenty of good BGA laptops, I've never needed to re-paste my Asus / MSI / Dell / Acer / HP BGA laptops.

    Others insist it's required, but I think most of it is probably unneeded. OCD'ers like thermal problems - not to be confused with OC'ers.

    Learn about what you do have, figure out what level of hardware hacking you *need* to do before buying it, and go into a purchase forewarned and forearmed for success :)
     
    hmscott, Jul 19, 2017
    #1083
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  34. plee82

    plee82 Notebook Evangelist

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    Lol you are convincing me to make a full desktop. Made a few for friends but I cannot really make one for myself, I got no space. Making these beasts with Ryzen is just too good.


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    plee82, Jul 19, 2017
    #1084
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  35. hmscott

    hmscott Notebook Nobel Laureate

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    Where there's a need, there's a way :)

    There are plenty of small form factor boxes now, and small motherboards that will power top CPU / GPU (single) builds.

    I'd wait for X399 with 8 core / 10 core ThreadRippers to release and get the bugs worked out, or the Ryzen Stepping 2 CPU's to release - maybe with motherboard updates for those too.

    Many months to enjoy your laptop; while watching AMD ripen and continue to improve. :)
     
    Last edited: Jul 19, 2017
    hmscott, Jul 19, 2017
    #1085
  36. plee82

    plee82 Notebook Evangelist

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    Tomorrow is the day!!


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    plee82, Jul 19, 2017
    #1086
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  37. plee82

    plee82 Notebook Evangelist

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    Capture.PNG

    OCCT and Heaven (extreme) 15 minutes with turbo fan. A bit of improvement. I replaced the 1mm thermal pad that were next to the chokes with 0.5mm. Also replaced the existing OEM 0.5mm thermal pads on chokes with Artic 0.5mm (compresses much better than gummy OEM pads). I did get the k5 pro but I wanted to try first since the Artic pads felt much softer.
     
    plee82, Jul 20, 2017
    #1087
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  38. tilleroftheearth

    tilleroftheearth Wisdom listens quietly...

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    Looks like you're well within the range (10C) that would put your system in the 'normal' and expected range now. :)

    I've been following your progress... you're very persistent! (Keep it up). :D :D :D

     
    tilleroftheearth, Jul 20, 2017
    #1088
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  39. plee82

    plee82 Notebook Evangelist

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    Persistent is a nice word, some people call it OCD LOL. Thanks!
     
    plee82, Jul 20, 2017
    #1089
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  40. plee82

    plee82 Notebook Evangelist

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    Capture2.PNG
    20 Minutes OCCT auto fan.
     
    Last edited: Jul 20, 2017
    plee82, Jul 20, 2017
    #1090
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  41. plee82

    plee82 Notebook Evangelist

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    Replaced choke 0.5mm with K5 Pro. Will post results. This is my last test.


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    plee82, Jul 20, 2017
    #1091
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  42. plee82

    plee82 Notebook Evangelist

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    Ok, got some good results I think.

    OCCT + Heaven with Turbo Fan
    Capture2.PNG


    OCCT Auto fan small data set.
    Capture.PNG
     
    plee82, Jul 20, 2017
    #1092
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  43. Falkentyne

    Falkentyne Notebook Prophet

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    Looking good! Nice work!
    *Edit* i can't read. You already tested the fans......
     
    Falkentyne, Jul 20, 2017
    #1093
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  44. plee82

    plee82 Notebook Evangelist

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    Yes when I combine OOCT and Heaven I manually go 100%. Just did again for five minutes and got 75, 70, 74, 71 with GPU 69.


    Sent from my iPhone using Tapatalk
     
    plee82, Jul 20, 2017
    #1094
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  45. Falkentyne

    Falkentyne Notebook Prophet

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    I scored 73,71,75,72 on an OCCT run with your settings (small size, fans at 100%, 7820k @ 3.5 ghz, -100mv undervolt).
     
    Falkentyne, Jul 20, 2017
    #1095
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  46. plee82

    plee82 Notebook Evangelist

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    Nice, GT73VR?


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    plee82, Jul 20, 2017
    #1096
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  47. plee82

    plee82 Notebook Evangelist

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    Man feels good to have narrowed the temp gap of 11C lol.


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    plee82, Jul 20, 2017
    #1097
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  48. Falkentyne

    Falkentyne Notebook Prophet

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    I had a temp gap like that before repasting. But now it's around 4-5C at around 70W of power draw.
     
    Falkentyne, Jul 20, 2017
    #1098
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  49. plee82

    plee82 Notebook Evangelist

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    Man I wish I had a GT72 or GT73 for separate heat pipes.


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    plee82, Jul 20, 2017
    #1099
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  50. Papusan

    Papusan Jokebook's Sucks! Dont waste your $$$ on Filthy

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    I haven't seen a single one :D
    Please change your Hwinfo setup to something better. Easier follow up important info.
    1D2A6DD0-7766-4632-A3D4-FC29C8C1C4FB.png
    Yeah, softer pads is more forgiving. And people working hard for best possible thermal paste application, but forget the pads.

    As you see, load on both cpu/gpu will easier showing problems with the cooling (shared pipes/heatsink). People test only the processor and later complaining they get heat problems when they launch games which push all the hardware.
     
    Last edited: Jul 20, 2017
    Papusan, Jul 20, 2017
    #1100
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