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Overclocking 8086K @ 1.35v

Discussion in 'Hardware' started by Lassar, 1 Nov 2018.

  1. Lassar

    Lassar Lean Mean Fighting Machine !

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    Hey all,

    Currently OCing my 8086k @ 5.1Ghz on 1.35 volts with a LLC of level 6 putting the V core on 1.36. Im running a custom loop and seeing a peak temp of 89c whilst running P95 Blend. All seems stable. I have tried 5.2 and 5.3 but it wanted silly volts.

    Anyone got opinions on my peak temps? too high?

    TIA

    Ric
     
  2. TheMadDutchDude

    TheMadDutchDude The Flying Dutchman

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    They’re fine. You’ll see a good reduction if you delidded the chip, but I wouldn’t worry about those peaks.
     
    Corky42 likes this.
  3. Lassar

    Lassar Lean Mean Fighting Machine !

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    Thanks MadDutchDude. Been running Prime95 Blend now for about 16 hours. Temps are fluctuating between 60-75 then spiking occasionally up to the mid 80s. Highest recorded temp was 91c on one core.

    I was hoping that my better cooling solution would keep it cooler but I guess the ihs gloop is really shite :)

    Interestingly the PC would pass Custom FFT and Cinebench at 1.285v but crashed in blend after 15 mins. Seems I have a standard chip as it likes 1.35v like everyone else.

    I won’t be delidding. Well not immediately anyway. I have 3 years warranty on it so don’t want to lose it.

    Interestingly compared to my old i7 920 this chip is bloody toasty!
     
  4. TheMadDutchDude

    TheMadDutchDude The Flying Dutchman

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    You can delid and retain warranty, just got to have the right guy do it for you. Trust me, I’ve returned plenty... :D

    If you were in the US, I’d offer. I don’t believe that you are, though. :(
     
  5. Anfield

    Anfield Well-Known Member

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    The i7 920 had a "monstrously huge" die of over 260mm2 while the 8086K is around 150mm2, that massive reduction in contact area between CPU and IHS matters a whole lot (and thats before we even get to the pigeon excrement they use as thermal paste).
     
  6. edzieba

    edzieba Virtual Realist

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    It could be magical space goop, pumping 1.35V (~170W-180W) through a 150mm^2 die is going to get hot. That's more than 1 watt/mm^2!
     
  7. TheMadDutchDude

    TheMadDutchDude The Flying Dutchman

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    It’s also severely hampered by the seriously thick layer of silicon that Intel use... as Roman “der8auer” has proven with the 9900K. The 8700K isn’t as bad, but still not great.
     
  8. Lassar

    Lassar Lean Mean Fighting Machine !

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    Well I just completed 25 hours of Prime Blend. Max temp was 91c on one core. Rest were 88-89c.

    5.1 GHz at 1.35v. Don’t think that’s a bad achievement?

    I did get a Cinebench score of 1703 at 5.2 but there is no way in hell it would pass P95.

    Thanks for the offer of a delid TheMadDutchDude but I’m the UK so not ideal :)
     
  9. TheMadDutchDude

    TheMadDutchDude The Flying Dutchman

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    You’re already right in the edge of stability with those volts and clocks. Nice one!

    Maybe I’ll have to organize a “when I’m back in the UK” delid and have everyone send them in for me to do while I’m there. :D
     
    Lassar likes this.
  10. Lassar

    Lassar Lean Mean Fighting Machine !

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    I may take you up on that TheMadDutchDude. Just done a bit of a session on BF1 and had a peak of 79c. My work here is done... now to overclock the 1080ti :D
     
  11. kosch

    kosch Trango in the Mango

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    I'm on my 5th delid for friends and family now. So if you are in the market for it happy to help or loan you the tool to do it.
     
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