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  1. #1
    ROG Guru: Yellow Belt Array
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    Things to try ~CPU overheating JM/JS/JZ models~

    To start, I've had 3 G750 JM models I bought all from Best Buy, after a problem with one i returned it to get another, 3 times. Each one benchmarked/stress tested fine when I first got it. But within a few days, while rendering, temps started to hit high 90's, and thermally throttled. A few days after that, even stress tests would lead to 100c temp and throttling on 1-3 cores as high as 25%.

    I then returned the last JM model, and figured this time I would try a different retailer and a different model of the G750 and try my luck that way. So went to amazon, bought a JS model. First thing/s i did, was render, stress test, just threw everything i could at it. Temps were still quite high, and again, within days temps were back 100c and thermal throttling.

    I have 3 weeks ago, filed with amazon and recieved a replacement JS model. Which i updated a few things, stress tested, updated a few more, then stress tested, updated more, stress test. Over and over, keeping an eye on thermals every update, to see if there or what there was that was causing high temperatures to turn into extreme temps. after updates things were still the same thermally, and I did rendering. Hitting around 90c I thought i was good. 90c is still high, but 10c away from throttling.

    Well, about about a week ago, those 90c temps were now 95-98c, and stress testing also proves those numbers. Gaming also yields me 85-90c cpu temps.




    Working with Hmscott on these forums, I think we've found a way to lower thermals, and not sacrifice turbo boost.

    1.First thing to do is make sure you have hwinfo (or something close but its the best), and intels extreme tuning utility.

    2.Then in XTU 'down volt' lowering both dynamic and cache voltage offset by -50.78. If you can get lower without wierd CPU respone or just a freeze needing a reboot then great.

    (anything lower makes my cpu % go from 99% to like 85%, doesn't crash but not good, but try with yours).

    3. Final and biggest difference making step. Drop the core multiplier for 3 and 4 active cores from 32x to 30x.

    (I dropped the core multiplier for 3 and 4 active cores from 32x to 31x. This led to me 95c-99c with spiked to 100c and throttling up to 5%. This was better than 32x, but still throttling. Dropping multiplier to 30x, gives me 86-94c, and spiking as high as 95c. So most extreme loads, below throttling with some room to spare.)



    **Differences in reducing the multiplier. Max turbo speed 3.4. At stock, highest I get is 3.29. Drop multiplier from 32x to 31x, yields me 3.09ghz. Dropping to 30x (which yields highest multiplier with no throttling), 2.99ghz.

    Alot of people try or recomend going into power management and putting cpu at 99% instead of 100% which disables turbo altogether. But that leaves chip alone at 2.4ghz. My way, thanks to following all Hmscotts advice, at least gets you to 3.0ghz and good temps.

    **I will be using these from now on, if anything happens or anything needs to be changed, I will update this original post, Date/time stamp it as well.

    But so far, stress tested several times on several programs and a very quick dvd render and no problems. I'll be trying a 3d scene out on tuesday once i get back to work.

    If your having problems thermally, please try this and report back anything. I'll post pictures of xtu to give better visials for those not technically inclined.

  2. #2
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

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    Quote Originally Posted by dblkk View Post
    ...

    3. Final and biggest difference making step. Drop the core multiplier for 3 and 4 active cores from 32x to 30x.

    ,,,
    dblkk, so in essence, Core 1 and 2 remain at stock multiplier, which lets single threaded apps and a 2nd background app to run at full Turbo of 3.4ghz, and the reduced multiplier for reduced Turbo of 3.0ghz only kicks in for Core 3 and 4, and only when you have a 3rd and 4th program thread running.

    And, that reduces the heat for your JS so that you don't thermal throttle, even for 100% load for 4-8 threads?

    That's a huge improvement, and gets the most performance out of a borderline CPU thermal situation

    There have been quite a few people with the JM/JS, and maybe some JZ's that could benefit from these settings, or a variation on them. Maybe some won't need to drop down to 30x multi, and can run without thermal throttling on 31x - only way to find out is to try it

    Thanks dblkk!
    Last edited by hmscott; 06-23-2014 at 01:49 AM.

  3. #3
    ROG Guru: Yellow Belt Array
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    Quote Originally Posted by hmscott View Post
    dblkk, so in essence, Core 1 and 2 remain at stock multiplier, which lets single threaded apps and a 2nd background app to run at full Turbo of 3.4ghz, and the reduced multiplier for reduced Turbo of 3.0ghz only kicks in for Core 3 and 4, and only when you have a 3rd and 4th program thread running.

    And, that reduces the heat for your JS so that you don't thermal throttle, even for 100% load for 4-8 threads?

    That's a huge improvement, and gets the most performance out of a borderline CPU thermal situation

    There have been quite a few people with the JM/JS, and maybe some JZ's that could benefit from these settings, or a variation on them. Maybe some won't need to drop down to 30x multi, and can run without thermal throttling on 31x, 32x, 33x - only way to find out is to try it

    Thanks dblkk!
    Yes, very good note. As for 1 and 2 core, those loads aren't whole core stressing, and stressing after changing just those doesn't effect temperatures at all.

    As for dropping multiplier for 3 and 4 cores to 31x, I should've noted that's a possibility, but I did note that when I tried it wasn't a acceptable outcome/difference. But thanks for adding that in.

    For 100% load, on any stress test ive thrown at it, highest temperature 'spikes' ive gotten has been 95c. Normally around 90-92c, which is roughly 10c less than before and below any throttling level.

    The stock levels for 3 and 4 cores is 32x, if you went up to 33x that would be overclocking the chip. With my experience and from what I've read, there have only been a handful of good stock temp JS models, and I don't see overclocking in most of our futures, laugh.

    I don't forsee any reason for me to have to RMA my laptop, but the whole 1 year accidental is whats keeping me from opening this sucker up to repaste. But if/when I do, I will make sure and include as much information on that experience as well. I will also include a video (probably loaded to youtube) on that as well.

  4. #4
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

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    Quote Originally Posted by dblkk View Post
    Yes, very good note. As for 1 and 2 core, those loads aren't whole core stressing, and stressing after changing just those doesn't effect temperatures at all.
    As for dropping multiplier for 3 and 4 cores to 31x, I should've noted that's a possibility, but I did note that when I tried it wasn't a acceptable outcome/difference. But thanks for adding that in.
    For 100% load, on any stress test ive thrown at it, highest temperature 'spikes' ive gotten has been 95c. Normally around 90-92c, which is roughly 10c less than before and below any throttling level.
    The stock levels for 3 and 4 cores is 32x, if you went up to 33x that would be overclocking the chip. With my experience and from what I've read, there have only been a handful of good stock temp JS models, and I don't see overclocking in most of our futures, laugh.
    I don't forsee any reason for me to have to RMA my laptop, but the whole 1 year accidental is whats keeping me from opening this sucker up to repaste. But if/when I do, I will make sure and include as much information on that experience as well. I will also include a video (probably loaded to youtube) on that as well.
    dblkk, I corrected the multi's, thanks

    Did you register for the accidental coverage? Most people don't know you have to register for that within 90 days of purchase. You do that here:

    Asus Accidental Damage Protection (ADP) at a Glance
    http://notebookcare.asus.com/Content/US/ADP/ADP.aspx

    Extended Warranty Service Package Activation
    http://vip.asus.com

    You found a workaround that you can use to prove to Asus that the uncorrected performance is unacceptable. You proved that the CPU is thermal throttling at stock settings, and you had to reduce the speed/performance of the CPU to get it to stop thermal throttling

    You should send it in for repair, this workaround is on the edge of needing repair - and could get worse - it might not be the paste, it might be a physical problem with the cooling system - a bad heat pipe, bad connection, etc - that could get worse with a physical bump. I wouldn't let it go for long without repair.

    But, at least you have a workaround so you can put together an alternative to use while the G750 is away for repair
    Last edited by hmscott; 06-23-2014 at 02:10 AM.

  5. #5
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    Thanks, I wasn't saying your muilti's were wrong, I was just stating with our new ones I don't forsee an overclock.

    I haven't registered, and just tried, got an error both times, so will try again tom and if it doesn't work ill email. So very very thanks for heads up, only thing I really care about on this warrenty.

    Af for sending in for repair, I have seen and had this same exact 'problem' on every single laptop now, between two different models, and at two differenet retailers, I really think its just the way things are for me. I doubt the laptop itself is broken, as that's a very very bad % of bad luck.

  6. #6
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

    Join Date
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    Quote Originally Posted by dblkk View Post
    Thanks, I wasn't saying your muilti's were wrong, I was just stating with our new ones I don't forsee an overclock.

    I haven't registered, and just tried, got an error both times, so will try again tom and if it doesn't work ill email. So very very thanks for heads up, only thing I really care about on this warrenty.

    Af for sending in for repair, I have seen and had this same exact 'problem' on every single laptop now, between two different models, and at two differenet retailers, I really think its just the way things are for me. I doubt the laptop itself is broken, as that's a very very bad % of bad luck.
    dblkk, fair enough, it is too bad you are seeing those temps though. I don't understand it myself, as before the G750 didn't go into thermal throttling at all, and I still don't think it should. It was the actual test we used here to decide whether to return or send in for RMA.

    You may have just had the bad luck of the draw, it isn't a good percentage for you personally, but you are only a sample of one

    I would still report it to Asus, and see what they say, Asus may have figured out a solution by now for production problems early on. So it makes sense to at least give them a chance to fix it for you. I am sure they would appreciate feedback to let them know their cooling system isn't doing a good enough job for you!

    There was a guy that complained about lines in his display for months, like 8+ months, replaced his screen 3 times, and never sent in his laptop to Asus to get it fixed. While during the same time several other people did send theirs in, like some have done recently, and they got back laptops with no lines in the display... we often become our own worst road blocks in life - it is up to you to decide what you want and ask politely for it, don't give up!

    I guess I am not ready to give up on Asus, and assume this is the way it is, because it shouldn't and hasn't been.

    Enjoy!
    Last edited by hmscott; 06-23-2014 at 05:11 AM.

  7. #7
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    Hi all i just created a screen shot of XTU to help the non-tech savvy and it doesn't seem to let me attach the file? i'm new to the forum so... call me a newb haha

    Edit: it is a screenshot after having changed the values
    Last edited by thewyrmking95; 06-23-2014 at 04:56 AM. Reason: forgot to add detail

  8. #8

  9. #9
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    Quote Originally Posted by thewyrmking95 View Post
    Yes, that is 100% correct, and identical to mine.

    Were you having thermal issues as well? Or is this either just to show, or to be safe?

  10. #10
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

    Join Date
    Jun 2013
    Reputation
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    Quote Originally Posted by dblkk View Post
    Yes, that is 100% correct, and identical to mine.

    Were you having thermal issues as well? Or is this either just to show, or to be safe?
    Guys, you down clocked the turbo for Core 3 and 4 to cut the heat generated, to stop thermal throttling when under heavy 4 core load.

    And, you kept the stock multi for Core 1 and 2 to keep performance up for single threaded +1 threads.

    How about you now OC Core 1 and 2 to get more performance for single threaded +1 threads - it shouldn't increase the heat enough to cause thermal throttling - at least it would be good to find out.

    Can you please check to see how a multi setting of 36x on Core 1 and 35x on Core 2 works?
    Last edited by hmscott; 06-23-2014 at 01:46 PM.

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