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  1. #1
    ROG Guru: Yellow Belt Array Nicklas0912 PC Specs
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    Core I9 7960x Overclock - 4.8Ghz Just cant it get stabel. any tips?

    Hello.

    Im overclockning my 7960x, currently max is 4750Mhz, Cinebench stabile.. But I cant get 4.8Ghz to pass no matter what, what is worng? did try up to 1.31 volts without any luck.

    Info about the OC right now:

    Asus Rampage VI Apex
    1.265 volt for the CPU
    Load line 6
    1.86 input for the CPU.
    Max Core temp: 73c
    VRM temps: 57c

    Any one know if is a temp issu with 4.8Ghz or?

    Thanks!

    Click image for larger version. 

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  2. #2
    ROG Guru: Gold Belt Array Menthol PC Specs
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    Nicklas0912,
    I have only had my 7980 for a couple weeks so I don't know what to expect yet but passing RB15 at 4750 seems pretty damn good to me, anything above 4600mhz gets difficult for me
    Temps and current seems to skyrocket very fast on these big chips I don't think software temp reading report 100% correctly during these fast bursts during benching
    looking on HWBOT I see one person pass RB15 at 4860 on custom water but the database is very limited on these chips and CPU's capabilities differ by a huge margin
    What is your Cache clocked to as that seems to increase needed current and voltage needed and temps

  3. #3
    ROG Guru: Yellow Belt Array Nicklas0912 PC Specs
    Nicklas0912 PC Specs
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    Quote Originally Posted by Menthol View Post
    Nicklas0912,
    I have only had my 7980 for a couple weeks so I don't know what to expect yet but passing RB15 at 4750 seems pretty damn good to me, anything above 4600mhz gets difficult for me
    Temps and current seems to skyrocket very fast on these big chips I don't think software temp reading report 100% correctly during these fast bursts during benching
    looking on HWBOT I see one person pass RB15 at 4860 on custom water but the database is very limited on these chips and CPU's capabilities differ by a huge margin
    What is your Cache clocked to as that seems to increase needed current and voltage needed and temps
    3125Mhz on Cache, can run like 3250Mhz on Cache no problem.

    oh well, just getting a Quad Rad 60mm instead of my currenty tripple 30mm.

    So will have total 1x Tripple 60mm 1x Quad 60mm, 1x single 80MM all push pull.

    But im getting 7980 XE in 20 days, so hope it can aleast 4.7Ghz

    But mabye im temp limit ye, looks like since it crash.
    Last edited by Nicklas0912; 12-27-2017 at 03:29 AM.

  4. #4
    Banned Array JustinThyme PC Specs
    JustinThyme PC Specs
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    If you are hitting 4.7 stable you are in the top 10% or better for that chip. Cinebench isnt exactly stable.
    Run RealBench and see what you get. If you can pass several runs of that then you are well on your way.

  5. #5
    ROG Guru: Gold Belt Array Menthol PC Specs
    Menthol PC Specs
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    Expect a lower overclock on the 7980XE, I am using a water chiller on my setup to help keep temps under control
    The best binned 7980XE from Silicon Lottery is 4.4 GHZ and delidded to reduce temps, they sell them for $2700.00

  6. #6
    ROG Guru: Yellow Belt Array Nicklas0912 PC Specs
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    Quote Originally Posted by JustinThyme View Post
    If you are hitting 4.7 stable you are in the top 10% or better for that chip. Cinebench isnt exactly stable.
    Run RealBench and see what you get. If you can pass several runs of that then you are well on your way.
    I will try it later it should could do it on 4750Mhz, can do Firestirke and timespy on 4800Mhz, just not Cinebench sadly.

    Quote Originally Posted by Menthol View Post
    Expect a lower overclock on the 7980XE, I am using a water chiller on my setup to help keep temps under control
    The best binned 7980XE from Silicon Lottery is 4.4 GHZ and delidded to reduce temps, they sell them for $2700.00
    Hmmm, I see many like Jayce 2 cent that can do 4.6/4.7Ghz on a single or Duo rad? mabye he was just lucky We see when it comes.

  7. #7
    Banned Array JustinThyme PC Specs
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    Quote Originally Posted by Nicklas0912 View Post


    Hmmm, I see many like Jayce 2 cent that can do 4.6/4.7Ghz on a single or Duo rad? mabye he was just lucky We see when it comes.
    20 rads wont make a difference if you cant get the heat off the core. Are you monitoring your liquid temp? A single 480 rad is more than capable of disipating the heat from the liquid but you must first get the heat off the IHS and into the liquid. Thats where most of the problem lies with these chips. Im running a 7900X and with dual 480 rads and 20 fans total, can easily keep my liquid temps near ambient and that helps but is not the limiting factor. My machine runs nearly silent with minimal loads but the temps on the core jump instantly when a load is applied and the only thing that changes is my liquid temp will start to rise slowly and the fans ramp up to keep it under 30C.

  8. #8
    ROG Guru: Yellow Belt Array Nicklas0912 PC Specs
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    Quote Originally Posted by JustinThyme View Post
    20 rads wont make a difference if you cant get the heat off the core. Are you monitoring your liquid temp? A single 480 rad is more than capable of disipating the heat from the liquid but you must first get the heat off the IHS and into the liquid. Thats where most of the problem lies with these chips. Im running a 7900X and with dual 480 rads and 20 fans total, can easily keep my liquid temps near ambient and that helps but is not the limiting factor. My machine runs nearly silent with minimal loads but the temps on the core jump instantly when a load is applied and the only thing that changes is my liquid temp will start to rise slowly and the fans ramp up to keep it under 30C.
    Im change my tripple to a quad, because Im running a Titan X Pascal in the loop too.
    Can do 4.8Ghz in firestirke and timespy, but need a little better temps for Cinebench.

    My higheste score so far, 4.8Ghz. Number 20 Hall of Frame Single card .

    All above me, useing Titan V or 7980XE / LN2.
    https://www.3dmark.com/hall-of-fame-...sion+1.1/1+gpu

    Click image for larger version. 

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  9. #9
    ROG Guru: Yellow Belt Array cekeu PC Specs
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    Exemple from Silicon Lottery, There is no 7960x:

    As of 12/01/17, the top 31% of tested 7980XEs were able to hit 4.4GHz or greater.
    As of 12/01/17, the top 65% of tested 7980XEs were able to hit 4.3GHz or greater.
    As of 12/01/17, the top 94% of tested 7980XEs were able to hit 4.2GHz or greater.
    As of 12/01/17, the top 100% of tested 7980XEs were able to hit 4.1GHz or greater.

    As of 12/01/17, the top 18% of tested 7940Xs were able to hit 4.6GHz or greater.
    As of 12/01/17, the top 32% of tested 7940Xs were able to hit 4.5GHz or greater.
    As of 12/01/17, the top 72% of tested 7940Xs were able to hit 4.4GHz or greater.
    As of 12/01/17, 100% of tested 7940Xs were able to hit 4.3GHz or greater.

    As of 12/01/17, the top 39% of tested 7920Xs were able to hit 4.6GHz or greater.
    As of 12/01/17, the top 85% of tested 7920Xs were able to hit 4.5GHz or greater.
    As of 12/01/17, 100% of tested 7920Xs were able to hit 4.4GHz or greater.

    As of 12/01/17, the top 16% of tested 7900Xs were able to hit 4.8GHz or greater.
    As of 12/01/17, the top 57% of tested 7900Xs were able to hit 4.7GHz or greater.
    As of 12/01/17, the top 84% of tested 7900Xs were able to hit 4.6GHz or greater.
    As of 12/01/17, 100% of tested 7900Xs were able to hit 4.5GHz or greater.

    As of 12/01/17, the top 7% of tested 7820Xs were able to hit 4.9GHz or greater.
    As of 12/01/17, the top 37% of tested 7820Xs were able to hit 4.8GHz or greater.
    As of 12/01/17, the top 68% of tested 7820Xs were able to hit 4.7GHz or greater.
    As of 12/01/17, the top 91% of tested 7820Xs were able to hit 4.6GHz or greater.

    According to Silicon Lottery:

    Intel Skylake-X Qualified Vendor list
    These are the components that Silicon Lottery has verified to work with the overclocks we test at.

    CPU:
    Intel 7800X
    Intel 7820X
    Intel 7900X
    Intel 7920X
    Intel 7940X
    Intel 7960X
    Intel 7980XE

    CPU Cooler:
    Any AIO watercooler 360mm or greater (240mm for 7800X/7820X).

    Thermal Compound:
    ARCTIC MX4
    Gelid Solutions GC-Extreme
    Noctua NT-H1
    Thermal Grizzly Kryonaut

    Motherboard:
    ASRock X299 OC Formula
    ASRock X299 Taichi XE
    ASUS X299 Rampage VI Apex
    ASUS X299 Rampage VI Extreme

    Memory:
    Quad Channel DDR4-2133 1.2V
    Quad Channel DDR4-2400 1.2V
    Quad Channel DDR4-2666 1.2V
    Quad Channel DDR4-2800 1.2V

    Ambient temperature:
    25°C or less.
    Last edited by cekeu; 12-27-2017 at 09:06 PM.

  10. #10
    ROG Guru: Brown Belt Array meankeys PC Specs
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    Guy's some good stuff

    With my 7920X the cache seems to be my bottleneck. If I set to AUTO I can pass a bench pushin it (Grant it I haven't messed with the voltage) Just for ****s and giggles try setting your cache to auto to get to the next notch. FYI SS cooling not delidded

    R15- 3208@4900Mhz

    http://hwbot.org/submission/3722231_..._7920x_3208_cb

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