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3400Mhz oc ram SA and IO voltages

Discussion in 'Processors and motherboards Intel' started by CalinTM, Oct 8, 2018.

  1. CalinTM

    CalinTM Ancient Guru

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    I have a 8600k and I oc-ed to 5ghz and my corsair ram to 3400 MHz. And I'm asking about the SA and IO voltages for this ram overclock. I'm using 1.22v IO and 1.25v SA. They are safe for 24/7 usage and for this 3400 ram overclock? RAM voltage is 1.36v.
     
  2. Agent-A01

    Agent-A01 Ancient Guru

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    No those are too high.

    Default voltage for SA is .95~ and IO is 1.05~.

    You do not need that high of voltage on either of those for low speed RAM.

    I say low speed because coffee lake can handle 4ghz DDR no problem.

    I suggest setting both to 1.05~ and testing for stability.
     
  3. CalinTM

    CalinTM Ancient Guru

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    Any other thoughts? I'm pushing my ram to 3400 MHz 16-18-38 timings. The 1.20 IO and 1.22 SA is ok for 24/7 for my 5ghz 8600k ?
     
  4. Geryboy

    Geryboy Ancient Guru

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    Shouldn't the bios have some suggested range? my xmp runs those voltages per default, they don't seem very high. I'm on Skylake. Ram voltage at 1.36 is normal no worries, could go higher.
     

  5. Agent-A01

    Agent-A01 Ancient Guru

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    They are too high, way beyond what's necessary for such a low clock speed.

    [​IMG]
     
  6. GREGIX

    GREGIX Master Guru

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    As Agent said, too much voltage. Mine is 1.192 sa , 1.16 io, and ram 4200...and cl17
     
    Last edited: Oct 24, 2018
  7. Geryboy

    Geryboy Ancient Guru

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    they might be too much, but if they're +100mV are they really unsafe? Maybe he got crappy ram that didn't pass anything above 3Ghz?
     
  8. GREGIX

    GREGIX Master Guru

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    May. Be. But I doubt that. Best way is just to test it first with aida stability test, then prime or hci memtest. Then gaming like some battlefield. Mysefl trying ddr3200c14 teamgroup oc to 3800 sa io is needed like stated above. 4500 lpx on the otherhand do not boot on my mb at xmp or manual 4500, but runs perfectly at 4200 17 18 18 34 tr 330
     
  9. Geryboy

    Geryboy Ancient Guru

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    If those voltages are set by auto settings and he doesn't have a temp prob, I really don't see the problem. My IO and SA voltages are auto 1.25V via motherboard. Never touched them for 3+ years, nothing happened. at the end of the day a mobo wouldn't run anything "dangerous" out of spec. If you want to set the voltage tight ok, but "dangerous"?
     
  10. CalinTM

    CalinTM Ancient Guru

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    I've set both to 1.1v
     

  11. GREGIX

    GREGIX Master Guru

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    Shold be fine. As for auto xmp settings for sa/io they are always way to high. May not dmg cpu or so but it is pure waste. Second thing is, as every increased voltage means more heat. So y, if you oc cpu in some cases that may mean a lot. Like have 200mhz more on all cores or not. Depends ofc on cpu, its IMC, motherboard etc...
    From my experience my cpu does not like anything more than 1.28 sa and 1.22 io. But I saw results ppl running with 1.3 or more, for tests mostly, like 4700mhz^^
    Anyway if you wonna squize more from RAMs play with cl and sec and tertiary even timings. But read a lot be4. Some settings can wipe your os ;) , well maybe not literaly but destroy booting or so.
     
    Geryboy likes this.
  12. CalinTM

    CalinTM Ancient Guru

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    And also, where I can find cpu pll oc voltaje? I'm using a Asus Z370-F motherboard, and I can't find this voltaje. I can only found something like internal pll or something like that. I will post pictures from the voltaje as soon as I arrive home.
    I'm asking about this cpu pll oc voltaje because I know that for Kaby Lake this may reduce cpu Temps if I out it lower than 1.2v or 1.2
     

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