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  1. #1
    ROG Guru: Yellow Belt Array Moises2018's Avatar
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    Angry Maximus X Hero: I-7 8700k does hit Turbo Frequency of 4.7Ghz!

    Hello

    My Intel I7 8700K processor does not hit the Turbo Frequency of 4.7Ghz. Shouldn’t this processor by default reach 4.7Ghz?

    In BIOS under the Extreme Tweaker tab I have listed:
    Target CPU Turbo-Mode Frequency: 4700Mhz
    Target CPU @ AVX Frequency: 4700Mhz
    Target DRAM Frequency: 2133Mhz
    Target Cache Frequency: 4400Mhz
    ASUS Multicore Enhancement is set to AUTO.

    In the windows the cores jump around at different speeds between 4.4Ghz. 4.5Ghz 4.6Ghz and my other lower speeds as well, but I don’t think I’ve seen it hit 4.7Ghz.
    Now, the crazy thing is when I run AIDA64 Stress test the CPU cores all drop down to 4.3Ghz. I have switched Power Options from Balanced (recommended) to Power Saver, but no luck. XMP profile is not enabled, as far as i understand this should work right out of the box (correct me if I am wrong).

    Why do the cores drop down to 4.3Ghz? Shouldn’t the cores all hit 4.7Ghz? What can I do to fix this?
    System specifications:
    Motherboard: Maximus X Hero
    BIOS Version
    : 1401
    OS: WIN 10 64 Bit
    CPU: i7-8700K @3.7GHz
    CPU Cooler: Corsair H100i Water Cooler
    Memory:
    G.SKILL TridentZ RGB Series 16GB (2 x 8GB) DDR4 3200 (PC4 25600)
    Video Card: Gigabyte GeForce GTX 1080TI
    SSD: Samsung 970 PRO M.2 (2280) 512GB &
    Intel 335 Series 240GB (secondary drive)
    Power Supply: Cooler Master Silent Pro 1000W
    Hard Drives: WD 700GB & WD 300GB SATA
    Optical Drives: 1 Asus Blu-Ray Drive & 1 DVD/RW Drive


  2. #2
    ROG Guru: Orange Belt Array Snakeyes's Avatar
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    Make sure you only check the "Stress CPU" box when you run AIDA64. Also, this could be due to the AVX negative offset setting (above zero)
    NAME THE SANDWICH: – White Bread, Lots of Baloney, Russian dressing and served with a small pickle.?


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  3. #3
    ROG Guru: White Belt Array Delta9K PC Specs
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    Take a look here ... worth looking at your ratio; Auto vs All Cores

    https://rog.asus.com/forum/showthrea...on-stock-8700k
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  4. #4
    ROG Guru: Yellow Belt Array Moises2018's Avatar
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    Quote Originally Posted by Snakeyes View Post
    Make sure you only check the "Stress CPU" box when you run AIDA64. Also, this could be due to the AVX negative offset setting (above zero)
    Hi Snakeyes, I have everything set to defaults which is 0 for the AVX negative offset. Thanks for trying to help.
    System specifications:
    Motherboard: Maximus X Hero
    BIOS Version
    : 1401
    OS: WIN 10 64 Bit
    CPU: i7-8700K @3.7GHz
    CPU Cooler: Corsair H100i Water Cooler
    Memory:
    G.SKILL TridentZ RGB Series 16GB (2 x 8GB) DDR4 3200 (PC4 25600)
    Video Card: Gigabyte GeForce GTX 1080TI
    SSD: Samsung 970 PRO M.2 (2280) 512GB &
    Intel 335 Series 240GB (secondary drive)
    Power Supply: Cooler Master Silent Pro 1000W
    Hard Drives: WD 700GB & WD 300GB SATA
    Optical Drives: 1 Asus Blu-Ray Drive & 1 DVD/RW Drive


  5. #5
    ROG Guru: Yellow Belt Array Moises2018's Avatar
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    Quote Originally Posted by Delta9K View Post
    Take a look here ... worth looking at your ratio; Auto vs All Cores

    https://rog.asus.com/forum/showthrea...on-stock-8700k
    So based on the thread above I changed the CPU Core Ratio to “Sync All Cores” and now when I run AIDA64 Stress test all cores hit the boost turbo speed of 4.7Ghz!

    However, the Vcore jumps back and forth between 1.376V and 1.392V, which give Temps at low to mid 80s. That make me feel super uncomfortable to run Temps and Vcore that high.

    I tried setting CPU Core/Cache Voltage from Auto to “Adaptive Mode”, but it had same results, the Temps and Vcoe did not drop.

    Any recommendations how I can lower the Vcore to safer levels?
    System specifications:
    Motherboard: Maximus X Hero
    BIOS Version
    : 1401
    OS: WIN 10 64 Bit
    CPU: i7-8700K @3.7GHz
    CPU Cooler: Corsair H100i Water Cooler
    Memory:
    G.SKILL TridentZ RGB Series 16GB (2 x 8GB) DDR4 3200 (PC4 25600)
    Video Card: Gigabyte GeForce GTX 1080TI
    SSD: Samsung 970 PRO M.2 (2280) 512GB &
    Intel 335 Series 240GB (secondary drive)
    Power Supply: Cooler Master Silent Pro 1000W
    Hard Drives: WD 700GB & WD 300GB SATA
    Optical Drives: 1 Asus Blu-Ray Drive & 1 DVD/RW Drive


  6. #6
    ROG Guru: Orange Belt Array Snakeyes's Avatar
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    The one thing that would definitely help, would be to de-lid your CPU, unfortunately that's not everyone's cup of tea and has a measure of risk. You could try re-seating your Corsair watercooler block using good thermal paste (assuming you haven't already done that). Also keep in mind that while stress testing for stability is worth the exercise, most if not all of typical activities including most gaming will not cause your system to run at those temperatures and as such leaving it as is might not be as big a problem as you might think.
    NAME THE SANDWICH: – White Bread, Lots of Baloney, Russian dressing and served with a small pickle.?


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    Asus Maximus X Code

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    Corsair HX1000i digital
    EVGA 1070 GTX TiSuperclocked+
    Samsung NVMe SSD 960 pro M. 2
    Samsung 860 Pro
    Watercooled with EK block radiator fans etc.


  7. #7
    ROG Guru: Green Belt Array Phillyflyer's Avatar
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    Quote Originally Posted by Snakeyes View Post
    The one thing that would definitely help, would be to de-lid your CPU, unfortunately that's not everyone's cup of tea and has a measure of risk. You could try re-seating your Corsair watercooler block using good thermal paste (assuming you haven't already done that). Also keep in mind that while stress testing for stability is worth the exercise, most if not all of typical activities including most gaming will not cause your system to run at those temperatures and as such leaving it as is might not be as big a problem as you might think.
    As Snake Eyes said....delidding will lower those temps....have delidded 3 chips thus far without issue....another factor is a push / pull configuration with ur rad using quality SP fans.I would also use a manual vcore to lower that voltage....would suggest a starting point of 1.28v...plus/minus
    Last edited by Phillyflyer; 06-29-2018 at 08:50 PM.
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  8. #8
    New ROGer Array
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    Reply

    I'm pretty sure its stock speed out of the box is 3.7 base...4.7 in turbo. I have the same chip and that's what the specs say. So your mobo must of activated automatically. (Mine was, maximus x formula) and if you want more stable reads on your CPU, deactivate intels speedstep and c-state (experts only) then your readouts shouldn't be so jumpy but you will consume more power at idle

  9. #9
    ROG Guru: White Belt Array
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    The advertised 4.7 GHz turbo speed is only available in single threaded scenarios. As you mentioned, when running a multi-threaded stress test it will drop to 4.3 GHz. Unless you change to "Sync all cores", which is technically overclocking the CPU. https://www.gamersnexus.net/guides/3...bo-8700k-8600k

    In order to lower the CPU Core Voltage you can select a different "SVID Behavior" in BIOS, but it might not be 100% stable on all CPUs.

  10. #10
    ROG Guru: Yellow Belt Array Moises2018's Avatar
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    Quote Originally Posted by Phillyflyer View Post
    I would also use a manual vcore to lower that voltage....would suggest a starting point of 1.28v...plus/minus
    Are you saying try to run the stress test at that manual Vcore of 1.28V? If it fails (do you mean get a BSOD) then try a slightly higher Vcore (keep doing it until id does not fail (BSOD)?

    How much of a Vcore increment increase should i try each time? For example, if a Vcore of 1.28V fails, should i next time try 1.29V?
    System specifications:
    Motherboard: Maximus X Hero
    BIOS Version
    : 1401
    OS: WIN 10 64 Bit
    CPU: i7-8700K @3.7GHz
    CPU Cooler: Corsair H100i Water Cooler
    Memory:
    G.SKILL TridentZ RGB Series 16GB (2 x 8GB) DDR4 3200 (PC4 25600)
    Video Card: Gigabyte GeForce GTX 1080TI
    SSD: Samsung 970 PRO M.2 (2280) 512GB &
    Intel 335 Series 240GB (secondary drive)
    Power Supply: Cooler Master Silent Pro 1000W
    Hard Drives: WD 700GB & WD 300GB SATA
    Optical Drives: 1 Asus Blu-Ray Drive & 1 DVD/RW Drive


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