The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    Question about Undervolting

    Discussion in 'Gaming (Software and Graphics Cards)' started by AhmedouviX, Aug 13, 2015.

  1. AhmedouviX

    AhmedouviX Notebook Consultant

    Reputations:
    0
    Messages:
    181
    Likes Received:
    63
    Trophy Points:
    41
    Hey guys

    EDIT: I am not sure if it's the right section but i am sorry if it isn't.

    I have a laptop with Core I7-4712HQ

    When i bought my laptop it came with Win8.1. i was able to undervolt the CPU -86 mV using XTU.
    i tested it for days on a lot of benchmarks "AIDA64, XTU, Prime95, cinnabench, geekbench, etc" and it was stable.

    I changed the thermal paste and the system became unstable i was able to undervolt to only -70 mV, made the tests and it's stable

    Now i upgraded to Win 10 and the CPU isn't stable on -70 mV! the laptop powers off when i try to apply my profile. using XTU 6.0.2.2

    Any idea what's causing this weird behavior?
     
    Last edited: Aug 13, 2015
    AhmedouviX, Aug 13, 2015
    #1
  2. D2 Ultima

    D2 Ultima Livestreaming Master

    Reputations:
    4,335
    Messages:
    11,803
    Likes Received:
    9,751
    Trophy Points:
    931
    I know for certain different versions of windows have different tolerances of overclocking and undervolting, but maybe your chip is just degrading? Have you tried getting say -50mV stable with Win 10?
     
    D2 Ultima, Aug 13, 2015
    #2
  3. AhmedouviX

    AhmedouviX Notebook Consultant

    Reputations:
    0
    Messages:
    181
    Likes Received:
    63
    Trophy Points:
    41
    Made a benchmark test and it passed

    Is it possible for cpu to degrade? The laptop is 4 months old only

    I am not even overclocking for long term usage. It's just for fun and benchmarks scores and just changing multipliers and core voltage offset

    Edit: it didn't pass on -60 mV.. From -85 to under -60 mV. Sad

    Sent from my D6503 using Tapatalk
     
    Last edited: Aug 13, 2015
    AhmedouviX, Aug 13, 2015
    #3
  4. D2 Ultima

    D2 Ultima Livestreaming Master

    Reputations:
    4,335
    Messages:
    11,803
    Likes Received:
    9,751
    Trophy Points:
    931
    I'm not sore how fast it can degrade or not. All I know is that the OS might have an influence on what's acceptable for undervolts/etc. What can I say?

    Just see how low you can go. Anything -30mV or better is still desirable to you.
     
    D2 Ultima, Aug 13, 2015
    #4
    AhmedouviX likes this.
  5. AhmedouviX

    AhmedouviX Notebook Consultant

    Reputations:
    0
    Messages:
    181
    Likes Received:
    63
    Trophy Points:
    41
    Okay another question, Are these settings can be harmful the CPU or the laptop? specially the processor current limit
    [​IMG]
     
    Last edited: Aug 14, 2015
    AhmedouviX, Aug 14, 2015
    #5
  6. D2 Ultima

    D2 Ultima Livestreaming Master

    Reputations:
    4,335
    Messages:
    11,803
    Likes Received:
    9,751
    Trophy Points:
    931
    nope. I will mention cache undervolting can cause crashes easier than core undervlting and you should try lowering that first
     
    D2 Ultima, Aug 14, 2015
    #6
    AhmedouviX likes this.
  7. AhmedouviX

    AhmedouviX Notebook Consultant

    Reputations:
    0
    Messages:
    181
    Likes Received:
    63
    Trophy Points:
    41
    Thanks!

    What about the processor cache ratio .. how much should I decrease it so it dosen't affect the performance?

    Sent from my D6503 using Tapatalk
     
    AhmedouviX, Aug 14, 2015
    #7
  8. jaug1337

    jaug1337 de_dust2

    Reputations:
    2,135
    Messages:
    4,862
    Likes Received:
    1,031
    Trophy Points:
    231
    Play around and see if there's any difference or if it is negligible.
     
    jaug1337, Aug 14, 2015
    #8
  9. D2 Ultima

    D2 Ultima Livestreaming Master

    Reputations:
    4,335
    Messages:
    11,803
    Likes Received:
    9,751
    Trophy Points:
    931
    Cache ratio is mostly negligible, but keep it as high as you can. 30x or 32x should be no issue at all for you though.
     
    D2 Ultima, Aug 14, 2015
    #9