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  1. #1
    ROG Enthusiast Array
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    Oct 2013
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    CPU overheating due to faulty fan/header - no shutdown??

    Hello

    I'm currently running an i7 6700K, clocked at 4.4GHz, with an Asus Maximus VIII Hero (CPU cooled by a CM Hyper 212 Evo).

    Recently I've had a few incidents with the CPU severely overheating. In all cases the CPU fan stopped completely, and had to be disconnected then reconnected to resume spinning.

    Unfortunately during these incidents the CPU core temperatures soared to the upper 90s. Twice it resulted in a crash, the other times I got weird screen corruption instead before I realised what was happening. The package temperature meanwhile got up to an insane maximum of 95C.

    The failure of the fan or the header it is connected to aside, how on Earth is it possible for the CPU to be allowed to get to such hot temperatures without the system automatically shutting down?? In every system I've ever built, there has been a CPU shutdown option in the BIOS that where you can configure the CPU package temperature at which the system will automatically power off. However, looking through the VIII Hero UEFI BIOS, I see no such option. Could it really be that in this day and age a premium motherboard does not come with this basic safety feature?

    With regards to the actual overheating, how likely is it that there will be damage to the CPU at these temperatures?

    Regards

    Odai.

  2. #2
    ROG Guru: Grand Master Array
    Join Date
    Oct 2012
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    You probably didn't reach the TJ Max that's why it didn't shutdown.

    As far as I know, the X99 platform was the first to have an adjustable TJ Max option in the BIOS.

  3. #3
    ROG Enthusiast Array
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    As I understand it, TJ Max refers to core temperatures. However, on all previous builds I've seen options to shut down the system based on high package temperature. How come this feature is not present on this board (assuming I haven't simply missed it)?

  4. #4
    ROG Guru: Yellow Belt Array Legolas PC Specs
    Legolas PC Specs
    MotherboardMaximus X Hero Wifi AC
    ProcessorIntel Core i7 8600k oc 5Ghz
    Memory (part number)Samsung DDR4 16GB
    Graphics Card #1ASUS NVIDIA GTX 1080
    MonitorASUS MS246
    Storage #1Samsung MZVPV256
    Storage #2Samsung MZVPV256
    CPU CoolerCorsair H110I v2
    Power SupplyPC 1200W Turbo-Cool 1200
    Keyboard ASUS SK2045

    Join Date
    Nov 2015
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    In BIOS, please make sure you set Q-fan to PWM Mode for 4 pin connector ( CM Hyper 212 Evo). For overclocking, I crank up to RPM 100% and awesome thermal paste for maximum thermal dissipation. You also need to incrase 100% for all the chassis fans as well.
    FYI, 4 pin = PWM, 3pin = DC. So, if you have chassis fans with 3 pin connector, it is DC. Hope it helps.

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