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H370M-ITX/ac + i7-8700nonK + thermaltake V1 = VRM throttling

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  • H370M-ITX/ac + i7-8700nonK + thermaltake V1 = VRM throttling

    It's my first post, so hello everyone.

    I've recently made my first build:
    H370M-ITX / ac
    i7-8700nonK
    thermaltake V1 case
    Cryorig M9i
    2x8 G.Skill Ripjaws V 3000
    1050Ti

    I've got a problem with CPU throttling. When 8700 power draw is over 140W for few seconds throttling occurs. XTU says it's throttling due to VRM thermals. So I've set cpu offset -0.1V it stable, power draw is lower, but still during stress test or encoding, it's over 140W. IMO, V1 case has not a bad airflow (intake: 1x200mm and out: 2x80mm). Blowing another fan on vrm section helps but not much. Heatsink during throttling on vrm is hot but not burning hot. Is there anyway to overcome this?

    Here

    ASROCK H370M-ITX/AC (Intel H370) Motherboard Review

    test setup had a i5-8400 and author did not mention about any problems. In fact he said:

    The H370M-ITX / AC's VRM is very good and will handle any CPU in a mini-ITX system.

    But I believe 8400 has considerable lower power draw, so he didn't notice any problems. Please comment and give me some advices.
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