Coffee Lake 6 core, this August with z370 chipsets?

Discussion in 'Intel x86 CPUs and chipsets' started by AbRASiON, Apr 26, 2017.

  1. toto7677

    toto7677 Member

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    Just curious to what vcore you are running for 4.7. I have my 8350k at 4.8 with 1.300v. Just trying to get an idea of what people are achieving as OC’s with what voltages.
     
  2. davros123

    davros123 Member

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    [​IMG]
    [​IMG]

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    OOPS!!

    I did specify at least 50% infill...but it turns out he did not set the infill!!! FARK!

    It bent the CPU PCB edges but it still works ok (I am using it now to type this). Let's see how he goes next time. This so reminds me of my early days of modding hardware for overclocks when I accidently lifted some tracks from my XFX graphics card doing a voltage mod...of the time I let the smoke out of my brand new Athalon.


    [​IMG]
     
    Last edited: Oct 15, 2017
  3. ASASN

    ASASN Member

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    Vcore is at 1.25 but to be honest it was just a quick n dirty oc. Haven't had time to thoroughly go over it although I can tell you it wouldn't boot at 1.2.
     
  4. Strik3r

    Strik3r Member

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    Finally got around to setting up some reasonable OC'ing on the 8700k

    I left speedstep on as I don't want my cpu sitting at 4.8-5ghz non stop.
    Voltage mode was set to adaptive with a -0.005 offset (as my mobo tended to overvolt by about this much).

    4700mhz on all 6 cores @ 1.25v @ 55 degrees avg
    4800mhz on all 6 cores @ 1.275v @ 60 degrees avg
    4900mhz on all 6 cores @ 1.33v @ 65 degrees avg (was hoping to get this stable @ 1.31 or 1.32 but it just kept failing stress tests).

    Those are all stable using 5 minutes stress tests. Not foolproof, but a reasonable indication.

    and finally

    5000mhz on all 6 @ 1.375v This really took some juice to get stable. There are no doubt other settings I could play with to improve stability with a bit less volts, but i'm not really interested in pushing it.

    From what I can tell, my chip is pretty much middle of the range. I've heard some people getting 5ghz @ 1.33 (and who knows, maybe if i played with everything mine could too). It is also possible that if i got rid of speedstep so the CPU was running at a constant speed and voltage that would also improve stability.

    For now 4800mhz on all 6 @ 1.275 seems to be a pretty nice sweet spot.
     
    Last edited: Oct 15, 2017
  5. Deano_20802

    Deano_20802 Member

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    I've only tested for a few hours at each step, but I'm on 4800MHz CPU and 4400MHz Ring with 1.290v so far, Prime95 and Realbench stable. AVX offset of -6.
     
  6. davros123

    davros123 Member

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    Nice. Those temps look way lower than me. What cooling are you using? Have you delidded?
     
  7. Strik3r

    Strik3r Member

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    My case is a Deepcool Genome ROG edition. It comes with an integrated watercooling system. It's basically the Deepcool Captain 360EX AIO with an added reservoir.

    Not delidded.

    I believe performance is comparable to a Corsair H110i.
     
    Last edited: Oct 15, 2017
  8. mr_mordred2095

    mr_mordred2095 Member

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    How hot does it get under Prime95 max heat mode?
     
  9. Strik3r

    Strik3r Member

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    talk about "stable" vs "Prime stable". Have had no issues with my aforementioned settings including running Intel's stress test program. As soon as I run prime, everything goes to crap.

    Current best is 4800mhz @ 1.32v at about 90 degrees running the heat test.
     
  10. mr_mordred2095

    mr_mordred2095 Member

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    I use Prime because if you're doing video encoding and other high-stress things, your CPU -WILL- get that hot (AVX instructions).

    If it's not Prime stable, it's not stable, straight up. I sell pre-overclocked machines at my store. I've had ones come back randomly bluescreening, even though they're 24H LinX stable.
     
  11. xxmorphxx

    xxmorphxx Member

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    980ti would be possibly the problem but it was just an 8350k...

    wow with 360rad aio still hits 90 degs? far out.
     
    Last edited: Oct 16, 2017
  12. Strik3r

    Strik3r Member

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    Well, only if you are *trying* to generate heat.

    My revised settings after playing around quite a lot this evening.

    4800mhz @ 1.30v with an AVX ratio offset of 1

    Maximum heat test pulls ~85 degrees. The other 2 Prime95 tests run @ about 65 degrees @ 100% load.

    Edit - scored another 100mhz barely increasing voltage

    4900mhz @ 1.31 with AVX ratio offset of 2.

    OR

    4833mhz @ 1.3v (100.7 BCLK * 48 multiplier) and AVX offset of 1. Gonna stick with this for a while - gets me an extra 20mhz out of my memory too.
     
    Last edited: Oct 16, 2017
  13. aussie-revhead

    aussie-revhead Member

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    But he lost HT at the same time .... Big hit to physics capabilities.

    :)
     
  14. toto7677

    toto7677 Member

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    Very interesting as we have near identical results. I am now running 4.9@1.32v. Using prime95 max heat test though I am only hitting 61c with a H105 AIO, though I decided to delid last night which made a difference as my temps had been a lot higher. Before the delid I could not run 4.9 stable without 1.35v.

    Tried for 5ghz and was able to boot in and use apps at 1.375 but it would crash/freeze early in to a prime/aida test. Temps where still fine (63c) but I wasn't to keen on pushing the voltage any higher.

    I personally prefer Aida64 over prime95 for longer tests and ran a 9hr test last night (CPU and FPU) stable with no AVX offset, max temp 57c and avg of 50c.

    EDIT: Just realized you have an 8700k. Thought you were someone else using an 8350k.
     
    Last edited: Oct 16, 2017
  15. MR CHILLED

    MR CHILLED D'oh!

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    Noctua NH-D15 is the (air) cooler of choice these days??
     
  16. ASASN

    ASASN Member

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    Yep as expected but the difference was smaller than I thought it would be. Half the threads yet only 20% loss at the same clock speeds...the little bastard surprises me :lol:

    Just so I'm clear I knew damned well the 8350k wouldn't be as strong as the 3770k long before I bought it and that it's just a stop gap until 8700k's are readily available.

    Anyway the 8350k is now delidded so I'm gonna have some fun :leet:
     
  17. mr_mordred2095

    mr_mordred2095 Member

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    Very good, I look forward to seeing results!

    And it looks like my 5Ghz guaranteed idea isn't so bad after all :leet:. Might go pick myself up 20 of these fuckers once stock is stable, 3 boards (one asrock, one asus and one gigabyte) and get benching to see which is the best board :p

    You watch, there'll be a golden chip hitting 5.3ghz on air :p
     
  18. neopheX

    neopheX Member

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    Waiting on the Maximus X Formula before getting a 8700k.. hurry up farken
     
  19. Deano_20802

    Deano_20802 Member

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    It's my go to :thumbup:

    I've tried a dozen in the last few months and it's not the easiest to install compared to some newer options, but it's the best performing / quietest in my testing. Still terrible aesthetics, but that bothers me none.

    I'm in the same boat, just wanted to play with some overclocking before I can get hold of a 8700K.

    I've about finished testing my baseline overclocks and hope to delid at the end of the week.
     
  20. Fouler

    Fouler Member

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    Any guesstimate on price? And will you be getting it here or there?
     

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