[Guide] How to take full control of the i7-8750H (Advanced version)

Discussion in 'MSI' started by hackness, Sep 19, 2018.

  1. katates

    katates Notebook Enthusiast

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    Yeah but somebody can not get 3467 with Hyinx and, OP has Samsung at 1.30V but i am at Hyinx with 1.20V and @3467mhz. So I am not sure if it worked out because it would be surprising for me.

    Also i was not able to set Cpu flex ratio to 8, no matter what i write it keeps going back to 22. When i try 4965 it says invalid. But 8 does not apply?
     
    Last edited: Aug 7, 2019
  2. 777baja777

    777baja777 Newbie

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    All the modules are different it doesn't mean that you can't because someone else couldn't. I have Samsungs on 1.20V at 3458MHz and it works stable. It clearly worked. Look at the transfer rates. If you don't believe go back to defaults, run the tests OC and run it again.
     
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  3. hackness

    hackness Notebook Virtuoso

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    Try running AIDA64's memory speed test at 8750H's max speed, you should see a much higher result.

    3467-1.20V-20-20-49-20-26-65535-694-9-18 AIDA64 2nd Run.PNG

    To increase the read speed, increase the tREFI.
    If you see BSOD or constant error, raise tRFC.
    If you see freezing, lower the tREFI.

    Stability Testing also requires about 2 full weeks of normal usage.
     
  4. katates

    katates Notebook Enthusiast

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    Would it be a problem if i use your settings to start with since I have 16gigs and another brand? I tried some tests and i get BSOD constantly should i only go with increasing tRFC?
     
  5. hackness

    hackness Notebook Virtuoso

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    Start with increasing the tRFC by 10 and repeat that until no BSOD is happening, since you are able to boot, it means that both of your RAM could support that frequency.

    Also I've been running @1.20V for about 1 month and more, it's stable on mine.
     
  6. xLima

    xLima Notebook Evangelist

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    I can attest to this 1.20V I did the same and reduced uncore to +150 all my good. Ofc I only OCed successfully to 3000ish.

    I then tweaker voltages and found it was stable.

    Sent from my BLA-L09 using Tapatalk
     
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  7. katates

    katates Notebook Enthusiast

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    I think i have weird problem memtest 4pass no errors, i can play games smoothly, but after games or stress tests when system becomes idle i get bsod or freezing. Could it be related to cpu undervolt?
     
  8. hackness

    hackness Notebook Virtuoso

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    It could be that the CPU UV settings worked fine for higher frequency but crashes at lower frequency.

    Back off a bit and see if it is still occurring.
     
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