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VRM temps after Turbo Boost enabled heavy OC on Asus Maximus VII Formula + 4790k

Discussion in 'Die-hard Overclocking & Case Modifications' started by uplink777, Aug 10, 2015.

  1. uplink777

    uplink777 New Member

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    GPU:
    32 GB Corsair Vengeance R
    Greetings,

    I recently decided to OC my 4790k. I was happily surprised with my results, allow me "brag" about them first :3 ["stable" and stable freqs [they're all stable, but I didn't give enough time to the first two settings to prove true stability, only the last one]]:

    5.0 GHz - 1.47 vcore, no fsb increase, level 8 CLLC, 140% CCC, 120°C CPTC, VRM Switching Freq. Auto, CPU PPC Extreme and AFM Off. About 72-78°C Prime95 10 minutes [I have serious water cooling] - no crash, but didn't want to fry him off for more time

    4.9 GHz - 1.35-1.37vcore, no fsb increase, level 8 CLLC, 140% CCC, 120°C CPTC, VRM Switching Freq. Auto, CPU PPC Extreme and AFM Off. About 68-70°C Prime95 30 minutes - no crash also

    4.8 GHz [I'm using this one] - 1.297 vcore, no fsb increase, level 8 CLLC, 140% CCC, 120°C CPTC, VRM Switching Freq. Auto, CPU PPC Extreme and AFM Off. About 60-68°C Prime 95 4 hrs - no crash of course

    My first question is. W/o oc, I've had my VRMs on 28-39°C, now on 4.8 GHz OC they are, even without CPU being Turbo Boosted to 4.8 GHz on all cores 45-55°C. Are these temps okay? Any clue why they go up, even when the CPU is 0.7 vcore and 800 MHz for half an hour?

    My second question is, isn't my cooling effeciency a bit low?

    https://www.facebook.com/permalink.php?story_fbid=10153330803306827&id=171179716826

    This is my PC, it's a bit different now, but both rads [240 monsta + 320 alphacool] are still cooling CPU only, there are two liquid pumps, running on low rpm [one runs 2.5k, one runs 3k rpm]. And most importantly, I use delid + water block, that is directly attached to cpu. Aren't my temps a bit high for such a configuration? My ambient is 22-27°C, and relative humidity is 40-55%.

    Thank You!

    P.S.: VRM's are aircooled, with stock cooler. The only thing that's watercooled is CPU.

    P.S.2.: vcore is being changed by adaptive offset, because I use the highest frequency as Turbo Boost and not non-Turbo Boost.

    P.S.3.: In SuperPi, on 5 GHz, I'm on par with 5.1 GHz 6700k. How is that possible? SuperPi only, elsewhere I'm weaker by 2-3%.
     
  2. -Tj-

    -Tj- Ancient Guru

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    GPU:
    Zotac GTX980Ti OC
    You dont need 140%, 130% is more then enough.. Also that 120C keep at default.

    Rest in digi+ at auto or default disabled..

    Cpu svid 1.80v is also enough up to 1.35v
     
  3. yosef019

    yosef019 Ancient Guru

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    GPU:
    MSI 980 4G Gaming @1500
    I'm at 4.6 at 1.340 v + 0.010v offset
    Shood I go higher? Temps 70-77 by the noctua cooler nhd14? There is any better cooling ?
     
  4. -Tj-

    -Tj- Ancient Guru

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    GPU:
    Zotac GTX980Ti OC
    I wouldn't go over that with Air cooling.
    Your voltage limit started at 4.5ghz when each 100mhz steep used at least +0.090v more , 4.5ghz 1.25?v, 4.6ghz 1.35v... It will probably need ~ 1.44v for 4.7Ghz. And 1.44v on haswell & 3d-gate voltage regulators, well... not so good,
    I noticed this 3d-gate ideal voltage is up to ~ 1.25-1.29V. Anything over 1.30v starts to overheat, same thing was by IvyBridge.


    Ideal it goes in +0.045 - 0.050v steeps for each 100mhz. Mine goes in ~ 0.045v from stock up to 4.7 -4.8ghz, then a wall happens and need at least 1.4v+, 5Ghz 1.4v wasn't enough..
     
    Last edited: Aug 11, 2015

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