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Thread: Cooler Master MWE V2 and MWE Bronze V2 LLC +SR + DC-DC

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    Old MWE Gold is manufactured by XHY and New MWE Gold/Bronze/White are manufactured by Gospower which outclasses XHY.

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    The ripple noise behavior is really strange according to cybemetics sheet on MWE WHITE & BRONZE, anyone have an idea what's going on?

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    Quote Originally Posted by rgbodosk View Post
    The ripple noise behavior is really strange according to cybemetics sheet on MWE WHITE & BRONZE, anyone have an idea what's going on?
    yup it's really weird. i was thinking maybe capacitors are not correctly matched/wrong calculated i mean impedance for output power? also depends which caps are for 12V rails... funny, that highest ripples are at light load maybe frequency is too low or too high (because can't be also too high) at light load and from this, ripples are highest and including my first idea, it can be reason of these strange noises...
    Last edited by psupply; 08-29-2019 at 04:58 PM.

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    Quote Originally Posted by psupply View Post
    yup it's really weird. i was thinking maybe capacitors are not correctly matched/wrong calculated i mean impedance for output power? also depends which caps are for 12V rails... funny, that highest ripples are at light load maybe frequency is the highest at light load and from this, ripples are highest and including my first idea, it can be reason of these strange noises...
    Why would frequency matter? Isn't ripple the measure of the amplitude of the waveform that comes after rectification?

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    Quote Originally Posted by hello_there_123 View Post
    Why would frequency matter? Isn't ripple the measure of the amplitude of the waveform that comes after rectification?

    Imagine very low frequency ripple, the smoothing capacitor can not keep the voltage steady over such a long time; the higher the frequency of the ripple the easier it is to eliminate.

    DC can still have frequency components.
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    Last edited by ashiekh; 08-29-2019 at 05:00 PM.

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    Quote Originally Posted by rgbodosk View Post
    The ripple noise behavior is really strange according to cybemetics sheet on MWE WHITE & BRONZE, anyone have an idea what's going on?
    With low load the Champion CU6901V uses a different modulation mode to boost efficiency. With that different modulation mode the ripple is higher, but so is the efficiency. You actually see this behavior on many high efficient power supplies, but most of the time the ripple difference isn't this big. But then again this is a budget orientated power supply, most other power supplies with a Champion CU6901V or similar chip cost twice as much.

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    Quote Originally Posted by -The_Mask- View Post
    With low load the Champion CU6901V uses a different modulation mode to boost efficiency. With that different modulation mode the ripple is higher, but so is the efficiency. You actually see this behavior on many high efficient power supplies, but most of the time the ripple difference isn't this big. But then again this is a budget orientated power supply, most other power supplies with a Champion CU6901V or similar chip cost twice as much.
    so it's a little bit bad idea, especially when ripples are about 90 mv on 12 V... it's probably caused because of wrongly set "Super Light Load with Kick Pin". what a catchy name. then, i would rather to see lower ripples of 50/60 mV and for sure less efficient psu.

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    Quote Originally Posted by -The_Mask- View Post
    With low load the Champion CU6901V uses a different modulation mode to boost efficiency. With that different modulation mode the ripple is higher, but so is the efficiency. You actually see this behavior on many high efficient power supplies, but most of the time the ripple difference isn't this big. But then again this is a budget orientated power supply, most other power supplies with a Champion CU6901V or similar chip cost twice as much.
    But that's rather strange because some of the(not all) MWE bronze has a 'M' shaped graph indicating that it uses the kick mode, but others' eff. graphs are just smooth. Maybe they fixed the problem on the retail model?

    https://www.cybenetics.com/d/cybenetics_Jv8.pdf MWE Bronze 550W
    https://www.cybenetics.com/d/cybenetics_f3n.pdf MWE White 550W

    An in-depth review or recert would be great.

    + and actually there is a review, but not really in-depth. http://coolenjoy.net/bbs/review/724438

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    Pretty sure this was a "sponsored" review.

    https://www.toutiao.com/i6729515179878384140/

    They complain there's no 80 PLUS logo on the Corsair PSU label. Umm.. It's on the box.
    They make no mention that the VS is full range.
    They didn't do any side-by-side component analysis.
    Didn't point out how small the PFC and EMI choke is on the CM (because it's 230V only).

    And I think it's funny that they point how "crowded" the filtering stage is and how there's "such a small opening" on the back of the PSU. Umm.. Filtering stage doesn't get hot and where there's no opening on the back of the PSU is where that filtering is and where the fan frame is. You can even see on the CM how the whole top part of the exhaust vent is covered by the fan frame.

    Duuuuuuhhhhh.......

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    Well, at least we have pictures now. Apart from those, nothing useful there.

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