Results 1 to 6 of 6
  1. #1
    ROG Member Array
    Join Date
    Aug 2016
    Reputation
    10
    Posts
    21

    Undervolting G752 Questions

    Hey, been watching alot of videos about undervolting the cpu and so on to keep it at a lower temp..


    Normal:
    Cpu temp: around 75c when i play most of my games. (and yes, i know this temp is nothing to worry about so dont bother bringing that up :P )

    Undervolting -0.150V
    Cpu temp: around 65c when i play the same games.

    So my first question for you PROs are :

    Will the 10c be better for my CPU/whole laptop in the long run?
    Saves me some fan noise aswell + that it will also take in less dust )
    and i've heard the batterylife is greatly improved aswell ^^ some say around 40%.. i have not tried yet thou.

    Second question:

    If i already managed to get the system stabil, are there any downsides to undervolting?
    And could it damage my cpu/computer in any way in the long run whatsoever?




    Computer: G752VS
    Gpu: Nvidia GTX 1070 DDR5 @ 8gb (256-bit)
    Cpu: Skylake i7 6700 @ 2.6Ghz (not the overclockable version)


    Thanks in advance!

    /Kim

  2. #2
    ROG Member Array
    Join Date
    Aug 2016
    Reputation
    10
    Posts
    21

    Anyone with any knowledge/experience of undervolting here?

  3. #3
    ROG Guru: Gold Belt Array Clintlgm PC Specs
    Clintlgm PC Specs
    Laptop (Model)Asus G752VY DH72
    MotherboardAsus Z97 Pro WiFi and /Z97 Pro A
    ProcessorI7 4790K
    Storage #1512 GB M.2 Samsung 960 Pro
    Storage #21 TB Samsun 850 Pro
    CaseCool Master Haf
    OS Win 8.1 Pro and Win 10 Pro
    Clintlgm's Avatar
    Join Date
    Jul 2012
    Reputation
    105
    Posts
    4,124

    Suggest you check out Dreamonic he has lots of experience.
    G752VY-DH72 Win 10 Pro
    512 GB M.2 Samsung 960 Pro
    1 TB Samsung 850 pro 2.5 format
    980m GTX 4 GB
    32GB DDR 4 Standard RAM

    Z97 PRO WiFi I7 4790K
    Windows 10 Pro
    Z97 -A
    Windows 10 Pro

  4. #4
    ROG Guru: White Belt Array
    Join Date
    May 2011
    Reputation
    16
    Posts
    123

    Intel has always used extra voltage. This allows Intel to guarantee long term stability without having to do a lot of long term stability testing. Imagine how much CPUs would cost to produce if Intel had to do 24 hour Prime95 type testing on every CPU that came down the assembly line. Much easier and cheaper to just bump up the voltage a hair.

    For most laptop owners, this results in a lot of wasted energy. The extra heat will require more fan noise and will also reduce run time when running on battery power. Not good.

    Enthusiasts learned that if they did their own testing, they could safely and reliably reduce the CPU voltage significantly. As long as you take the time and are able to pass a wide variety of stability tests, there is nothing negative about under volting. It is not unusual for a CPU to need slightly more voltage after it initially breaks in. That's why it is not a bad idea to run some stability tests every few months just to confirm that the voltage that you came up with is still adequate, and your CPU is still 100% stable.

  5. #5
    ROG Member Array
    Join Date
    Aug 2016
    Reputation
    10
    Posts
    21

    Thanks for the answers!

    That made me a lot wiser tbh

    I'll do some heavy testing now to see what's the lowest i could go for my computer atm, and keep on checking it every now and then.

    Thank you once again!

  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
    Jun 2013
    Reputation
    44
    Posts
    5,357

    Quote Originally Posted by unclewebb View Post
    Intel has always used extra voltage. This allows Intel to guarantee long term stability without having to do a lot of long term stability testing. Imagine how much CPUs would cost to produce if Intel had to do 24 hour Prime95 type testing on every CPU that came down the assembly line. Much easier and cheaper to just bump up the voltage a hair.

    For most laptop owners, this results in a lot of wasted energy. The extra heat will require more fan noise and will also reduce run time when running on battery power. Not good.

    Enthusiasts learned that if they did their own testing, they could safely and reliably reduce the CPU voltage significantly. As long as you take the time and are able to pass a wide variety of stability tests, there is nothing negative about under volting. It is not unusual for a CPU to need slightly more voltage after it initially breaks in. That's why it is not a bad idea to run some stability tests every few months just to confirm that the voltage that you came up with is still adequate, and your CPU is still 100% stable.
    Thanks for the comments supporting undervolting. *It's so easy to do and gives back so much to the owner, reducing CPU temps by up to 10c under heavy 100% CPU load, dropping the load temperatures under the thermal throttling point, and avoiding the need for re-pasting.

    I've actually noticed that I can undervolt more over time, rather than seeing an increase in voltage needed. *I had one G750JH that undervolted @ -15mV maximum when I first got it, but over the 2 years I had it I was slowly able to increase the undervolt to -60mV, and that small improvement improved thermals even more.

    I have seen heavily OC'd desktop CPU's require more voltage over time. *I had an Intel 920 OC running SETI@home 24/7 and it did start crashing after a couple of years, and I needed to reduce the OC or increase the voltage, so I reduced the OC and decreased the voltage a bit too in an attempt to extend the life of the CPU.

    That's the other benefit of undervolting, besides dropping below the thermal throttling point - if you are exceeding it to begin with - the undervolted reduced temps under all conditions should help extend the life of the CPU.

    Maybe it's what helps improve the voltage undervolt vs the hot/high OC CPU voltage needing more over time?

    Thanks again for all your helpful posts **
    Last edited by hmscott; 12-02-2017 at 03:05 AM.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •