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  1. #1
    New ROGer Array
    Join Date
    Mar 2019

    9900K OC help pls

    Hey guys. I am really new at OC I need some advice and tips.

    my setup is the next:
    VGA: GTX1080TI
    RAM: DDR4 3600mhz 16 GB
    board: Rog strix z390 F-gaming
    cpu cooler: Noctua u-14s
    psu: seasonic 750w platinum

    I would like to OC my CPU to 5ghz in a safe way. I tried it with a video (youtube) like 2 days ago but it was not stable if I had a stress stest and gave me Blue screen errors. (kernel) I think heat could not be a problem ( I checked with HW monitor) but im looking forward your replies.
    Thank you so much for the help.

  2. #2
    ROG Guru: Blue Belt Array jab383 PC Specs
    jab383 PC Specs
    Motherboard24/7 rig : Maximus VI Extreme
    Processori7 4790K
    Memory (part number)16GB Mushkin Redline 2400 10-12-12-28 + 16GB Corsair Vengeance 2400 10-12-12-31
    Graphics Card #1AMD Firepro W5000
    Sound CardM6E Supreme FX
    MonitorDell U2413
    Storage #1Kingston SH103S3240G SSD
    Storage #2Seagate ST1000DM003 1TB
    CPU CoolerCustom water loop, Delidded, Liquid Metal TIM
    CaseCoolerMaster HAF XM
    Power SupplyCorsair HX-750
    Keyboard Logitech G710+
    Mouse Logitech M705
    OS Windows 7 64 Pro
    jab383's Avatar
    Join Date
    Feb 2014

    Air cooling is always the limitation, and more so with higher core count. 5GHz may be too high a target. The real culprit is core voltage - heat rises with voltage squared at constant clock speed. First try to reduce voltage to see if heat-induced blue screens stop and/or temperatures come down. It would be good to have stress test temperature under 80C.

    I suggest trying 4.5 - 4.6 GHz with lower core voltage. Adjust voltage in .02 volt steps -- up if unstable or down to find the lowest voltage that works when it is stable. Save a profile that works, then try the next higher multiplier and adjust voltage as before. Rinse and repeat until you find a good clock/voltage profile. Watch that temperature, and don't use a setting that goes over 80C.

    Keep a 2 or 3x multiplier setback for AVX instructions set in BIOS. Clock will be lower in parts of the test that use AVX, but that's better than a huge temperature spike that happens otherwise. The setback lets non-AVX software run at higher speed at the same core volts.

  3. #3
    ROG Guru: White Belt Array HisEvilness PC Specs
    HisEvilness PC Specs
    MotherboardASUS ROG Maximus Hero XI
    ProcessorIntel i7 8086k
    Memory (part number)32gb G.Skill TrridentZ RGB
    Graphics Card #1ASUS ROG 1080ti
    MonitorAcer Predator 27Inch/Iiyama G-Master GE2488HS-B2/ProLite E2474HDS
    Storage #1Samsung 960 EVO
    Storage #2Samsung 860 EVO x 2
    CPU CoolerCorsair 150i Pro
    CaseLian-Li Dynamic
    Power SupplyRMx 850
    Keyboard Roccat Vulcan 120 AIMO
    Mouse Roccat Kone AIMO
    Headset Sennheiser 58X
    OS Win 10 Pro 64
    Network RouterASUS RT-N18U
    HisEvilness's Avatar
    Join Date
    May 2017

    BSOD usually means your overclock is almost stable since it did actually boot but fails under load so you will need more vcore to be stable.
    And consider a closed loop cooler it will greatly help your overclock and the 9900k is churning out a massive amount of heat, the main reason i went for the 8086k over the 9900k. Temps should be your main concern when overclocking and keep that 24/7 overclock going. mid 80's C under load should be what your aiming for and 30 to 40 c while idle/browsing etc.

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