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  1. #1
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    G750 JS - CPU Overheating, What Thermal Solution ?

    Hi

    I bought this laptop (G750js-DS71) not more than a month ago, and I noticed that the temperature spikes a lot in no time.
    I tested a light 3d scene rendering (using all 8 threads at 100% load) and the temperature spiked to around 96 Celsius in less than 10 seconds
    That is too dangerous for the CPU, knowing that the Tj max is 100C. The thermal solution is supposed to keep the temperature below the Tj max at all times even when it is running on 100% load especially since the laptop is brand new and aging/heat shouldn't have affected the grease yet.

    I started questioning the thermal solution in terms of:

    1- Thermal Compound:
    The thermal compound that comes installed doesn't seem to be conductive enough ..

    2- Fan speed:
    could be the problem if they're not fast enough to change speed, but even on max speed the temp was above 90C at 100% load

    Questions:
    What are the detailed specs of the stock thermal compound ?
    Could the compound break even when the laptop is still new ?
    Anyone else got the same problem on 100% CPU load ? and what did you try so far ?

    additional info:
    - I'm not using any tweak tools nor overclocked the gpu/cpu
    - The fans are running on auto speed (not fixed)
    - on idle state the minimum temp is around 38C
    - on gaming state, reaches around 80C

    Regards,
    CME64
    Last edited by CME64; 06-16-2014 at 02:01 AM.

  2. #2
    ROG Guru: Brown Belt Array Darnassus PC Specs
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    Laptop (Model)G752VS -=-=- G750JX
    MotherboardASUSTeK COMPUTER INC. G752VS (U3E1) -=-=- ASUSTeK COMPUTER INC. G750JX (SOCKET 0)
    Processori7 6700HQ @ 2.60GHz -=-=- i7-4700HQ CPU @ 2.40GHz - 3.40GHz
    Memory (part number)2x16gb (M471A2K43BB1-CRC) -=-=- 2x8gb (HMT41GS6AFR8A-PB)
    Graphics Card #1GTX 1070 (8GB) -=-=- GTX 770M (3GB)
    Sound CardRealtek High Definition Audio / NVIDIA High Definition Audio
    MonitorGSync IPS 75HZ -=-=- Chi Mei 60Hz (Overclocked to 85Hz)
    Storage #1Samsung SSD 960 EVO 250GB x2 -=-=- LITEONIT LCS-256M6S
    Storage #2HGST HTS721010A9E630 -=-=- ST1000LM024 HN-M101MBB
    CPU CoolerStock -=-=- Stock
    CaseStock -=-=- Stock
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    Keyboard Stock -=-=- Stock
    Mouse Razer Naga Epic 1st Generation
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    Darnassus's Avatar
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    What is your ambient tempurature? Have you overclocked your CPU? Might be a good idea. Makes it run cooler! ;3

    What game you playing?

    What bench tool you using to put CPU under 100 load? I will replicate and tell you my own score.

    Highest history of CPU temp for me is 79*C and GPU 84*C

    Idle sounds good, mine is usually 45-50. As of this post 46. Net browsing only.

    Thermal GOOO sounds it's just some cheapie from Coolermaster maybe. The G750 series uses cheap parts in it other than the mandatory GPU, CPU.
    Last edited by Darnassus; 06-16-2014 at 05:13 AM.

  3. #3
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    Thank you for replying,

    Ambient temp: below 28c
    As I mentioned I didn't overclock the CPU nor GPU
    What games hmm, lots of them, but the highest temp reached was with "Watchdogs"
    I didn't use benchmarks, I was rendering a teapot on a plane with plain default materials using 3ds Max's default render engine,
    I could limit the threads used by the process to use 1 thread for each core to spread the temp but still, I'll be running on 50% load which is unacceptable
    My idle temp is almost the same, but I posted the best record of current 2 days log
    I tried Coolermaster's products before (on other laptops) and they were great. I don't think they're using it
    I would have paid extra for a better compound to be installed like arctic silver 5 or something, but unfortunately that is not an option as they claim to install a high end compound on ROG series. And I don't intend to void the warranty by installing a new one, at least not too soon .

    Will you try rendering a teapot with 3ds max ? :P

    Regards,
    CME64

  4. #4
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    undervolt the cpu -50mv and enjoy -5°C
    Laptop : ASUS G750JW : i7 4700HQ - 16Gb - 2Tb HDD - GTX 765M OC (+135/500) - Full HD Matte - Win 8.1
    Retiered : Toshiba L670 i5 560M/8Gb Corsair/1TB/HD5650 1Gb @ 625/800 /WD 1Tb USB3/Win7

  5. #5
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    I've had 3 Jm's and 2 Js's. All of which easily got to high 80-low 90c. And while rendering get up to 100c and thermally throttle. If you undervolt the cpu, it helps a little. But my JS now, undervolted, during games (in general titanfall borderlands bf4 ect) my cpu temps are still 85c. I guess this is just the new temps with optimus chips. THe last versions had the igpu part of the die cut off, and asus listening to customers who wanted better battery and optimus, then made that the enw way with these last g750's. Higher heat, trade off for 4-5.5 hours of battery, vs the 2.5-3 on last gens fully gpu machines.

    Tradeoff I'm willing to make I guess.

    But your temps are yes high, from what ive seen 5 times personally, your temps are average. Laptop is fine 100% up to 100c, then itll throttle.

  6. #6
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    Thank you all for replying,

    As far as I know, undervolting electronic components reduces it's performance and could potentially be damaged by that ( when it requires more voltage than it gets)
    also this may void the warranty (when the CPU dies) which I could have voided by replacing the thermal grease in the first place, back to square one
    I may have that as my before-last resort

    Seems that everybody is getting to dangerous heat levels with this series!
    I wonder what the architecture designers were thinking when they built it like this ! and yet bragging about it's ultimate cooling solution !
    at least if they failed to keep the heat lower than tj max by at least 20% at 100%, why not research a solution to the problem !?
    btw the heat will increase over the years (as the grease deteriorates) and that's why I'm concerned since the laptop is still brand new and it reaches dangerous temp levels
    Last edited by CME64; 06-16-2014 at 04:41 PM.

  7. #7
    ROG Guru: Brown Belt Array Darnassus PC Specs
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    Laptop (Model)G752VS -=-=- G750JX
    MotherboardASUSTeK COMPUTER INC. G752VS (U3E1) -=-=- ASUSTeK COMPUTER INC. G750JX (SOCKET 0)
    Processori7 6700HQ @ 2.60GHz -=-=- i7-4700HQ CPU @ 2.40GHz - 3.40GHz
    Memory (part number)2x16gb (M471A2K43BB1-CRC) -=-=- 2x8gb (HMT41GS6AFR8A-PB)
    Graphics Card #1GTX 1070 (8GB) -=-=- GTX 770M (3GB)
    Sound CardRealtek High Definition Audio / NVIDIA High Definition Audio
    MonitorGSync IPS 75HZ -=-=- Chi Mei 60Hz (Overclocked to 85Hz)
    Storage #1Samsung SSD 960 EVO 250GB x2 -=-=- LITEONIT LCS-256M6S
    Storage #2HGST HTS721010A9E630 -=-=- ST1000LM024 HN-M101MBB
    CPU CoolerStock -=-=- Stock
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    Quote Originally Posted by CME64 View Post
    Thank you all for replying,

    As far as I know, undervolting electronic components reduces it's performance and could potentially be damaged by that ( when it requires more voltage than it gets)
    also this may void the warranty (when the CPU dies) which I could have voided by replacing the thermal grease in the first place, back to square one
    I may have that as my before-last resort

    Seems that everybody is getting to dangerous heat levels with this series!
    I wonder what the architecture designers were thinking when they built it like this ! and yet bragging about it's ultimate cooling solution !
    at least if they failed to keep the heat lower than tj max by at least 20% at 100%, why not research a solution to the problem !?
    btw the heat will increase over the years (as the grease deteriorates) and that's why I'm concerned since the laptop is still brand new and it reaches dangerous temp levels
    What video driver you on? The latest being 337.88 boosts FPS and performance of Watch Dogs by 75%. I couldn't play that game on my JX at low, now I am playing on ultra setting.

    Undervolting the CPU doesn't damage it, check out a guide around here, I think it's much better for it.. less voltage, less heat.. longer life. ;x

    Overclocking the GPU is a different story.

    Do you have your laptop on a bed? solid surface?

    The laptop draws 30-40% air from the bottom of the unit, with the 60% through the tweeters ( speakers ) located underneath / behind the screen joint.

    If your keyboard gets dusty and you are brushing it off, then chances are the majority of the airflow is constricted by dust build up. You can easily clean the speaker mesh by removing the very back piece of the laptop by removing.. I believe around 7 screws. The piece then snaps off, but be careful not to break the speaker wire.

    P.S. the myth that this laptop draws air through the keyboard is busted.

  8. #8
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    LOL the problem is CPU heat not GPU, though I'm using the 337.88 driver and the game works fine just eats up like 11gb of memory.
    I read about undervolting, many say it's safe and others say otherwise it seems to be a moot.
    seriously you're asking that question ? no way, it's on top of a coolermaster x3 fan all the time on max speed and I cleaned that fan the day I bought the laptop.
    As for dust I don't think so, the keyboard is covered all the time with the light white sheet that came with it (just to protect it from dust) since I'm using an external one, and currently my usage of the laptop is below 10, ps this baby is only 3 weeks old. In other words, there is no way it's a dust problem.
    what's that rumor about it drawing air from the keyboard? .. I never heard of it .. I know air is drawn from the bottom and expelled from the back.
    I posted this thread to see if others had the same problem and what they did about it, and the undervolting is an interesting idea I would save for last
    Also I was expecting to get a reply from ASUS regarding their cooling problem and see what they would say about it ..

    Regards,
    CME64

  9. #9
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    Let me know if u got any answer from them. I just bought a JS model and i am getting Cpu temps too high (92-95c).

  10. #10
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    @CME64 i have the exact same model and i can confirm u have a bad laptop that's it. i can benchmark or play games like watchdogs at a solid 55 fps gpu running at full clock and my temps are around 70c full cpu benchmark was hitting 75c for cpu. u should contact asus and rma for bad thermal compound application. just to confirm my cpu when being stressed is around 3.17ghz always and around the 70c range. i let my fans do their own thing but whenever i game with headphones i just flip the switch for max fans to guarantee a cool laptop. what u describe is definitely a failure with the compound application. let me know on any new news u have. or contact me though PM.

    good luck with the troubleshooting.

    btw this is my second JS model the first one i had had a horrible gpu down-clocking issue. it seems like alot of these new models are having issues. lots of threads being made especially about thermal issues.

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