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  1. #1
    ROG Guru: Platinum Belt Array Rockford's Avatar
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    CLR Cmos working for you? B450/X470

    I want to ask this question, because its the first time for me a motherboard CLR Cmos function is not working properly

    Bios 1103 and 1201 can very easy lock up the motherboard when i am playing with memory overclocking
    This is sometimes resulting in orange light post hang (B450-I, X470)
    Short the CLR Cmos pins, pulling CPU, power and battery have no effect what so over, it will still be stuck on orange light hang
    (the only way to make the board post is to change the installed hardware so the board is forced to recognize new configurations)

    How is this even possible? after all CLR Cmos is CLR Cmos

    It can be an major effort to make the motherboard post normally again

    Sometimes the CLR Cmos is working like it should, but most of the times its not (especially with manual memory overclocking)

    Is this function really clear cmos?
    Last edited by Rockford; 02-21-2019 at 06:28 PM.
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  2. #2
    ROG Enthusiast Array aaraujo PC Specs
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    MotherboardASUS ROG STRIX X470-I GAMING
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    First cut the power to the power supply. Then clear the CMOS by shorting the two "Clear CMOS" pins for a few seconds. See the manual. Leave the power supply off until all the LEDS in the motherboard are off. This is how you know that all the electricity has been drained from the motherboard. That should clear the CMOS with success.

  3. #3
    ROG Guru: Platinum Belt Array Rockford's Avatar
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    It won't help dude
    UserBenchmarks: Game 22%, Desk 89%, Work 70%
    CPU: AMD Ryzen 5 2600X - 101.6%
    GPU: AMD HD 5770 - 12.8%
    SSD: Kingston HyperX 3K 120GB - 85.6%
    HDD: Seagate Barracuda 7200.14 1TB - 119.1%
    RAM: Crucial BLT4G4D30AETA.K8FD 2x4GB - 122.1%
    MBD: Asus TUF X470-PLUS GAMING
    Wind in my hair

  4. #4
    ROG Guru: Platinum Belt Array Rockford's Avatar
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    sorry for double posting, i am on phone and to edit a post is too much of an effort!

    This phenomena only occur for me with extreme memory overclocking, manual settings (not cpu overclocking)

    Before the cmos was just cmos, and clr cmos did just what its saying (cmos is volatile so it can be cleared with ease)

    But if i understand things correct, on x470, b450 the cmos is integrated with RTC and the PCH, so i dont know if this adds complexity to the scenario

    someone else may have more knowledge about this than me, however the bios lockup problem is a fact
    Last edited by Rockford; 05-12-2019 at 12:01 PM.
    UserBenchmarks: Game 22%, Desk 89%, Work 70%
    CPU: AMD Ryzen 5 2600X - 101.6%
    GPU: AMD HD 5770 - 12.8%
    SSD: Kingston HyperX 3K 120GB - 85.6%
    HDD: Seagate Barracuda 7200.14 1TB - 119.1%
    RAM: Crucial BLT4G4D30AETA.K8FD 2x4GB - 122.1%
    MBD: Asus TUF X470-PLUS GAMING
    Wind in my hair

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