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Thread: CoolerMaster Silent Pro Gold 600W Review@ PCPOP

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    Default CoolerMaster Silent Pro Gold 600W Review@ PCPOP

    The article (Chinese)

    Last week the KitGuru guy posted a review of this power supply which showed suspiciously low ripple (30mV @ full load) on +12V output. In PCPOP's article, the results came out as I expected on this power supply, which is ~116mV at 10ms time base and ~80mV at 10us time base.

    oscilloscope capture of +12V output at 10ms time base:
    http://img5.pcpop.com/ArticleImages/.../001711142.jpg

    and 10us time base:
    http://img5.pcpop.com/ArticleImages/.../001711143.jpg

    Do you still think this power supply has exceptional clean output?
    It's been a hard day's night and I've been working like a dog.

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    considering that the 1200 I reviewed had very high ripple I wouldn't expect the 600 to have such low (30mV!).

    Thanks for the info Travis!

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    Nice review

    Cooler Master is famous for their high ripple units so ... no surprise there (at least on +12V rail)

    Quote Originally Posted by Travis View Post
    The article (Chinese)

    Last week the KitGuru guy posted a review of this power supply which showed suspiciously low ripple (30mV @ full load) on +12V output. In PCPOP's article, the results came out as I expected on this power supply, which is ~116mV at 10ms time base and ~80mV at 10us time base.
    I noticed something else in their reviews ... nominal voltage on 100% load i almost always perfect (most of the units they tested) ... which is kind of strange.

    And then again, this CM unit really does have good regulation (regardless of the person reviewing it ).

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    Aren't those 10ms results aliased?

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    I know environmental factors can cause ripple to be higher than expected, but could something environmental cause it to be lower than expected?

    Also, someone should probably email the reviewer and let him know that their could be an issue with his equipment.

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    Quote Originally Posted by rafal_iB_PL View Post
    Aren't those 10ms results aliased?
    Yes that's why the waveform at 10us timebase is important. Even so, you still have a general idea about the period and amplitude of its low frequency component and the peak-to-peak value of this aliased trace is no higher than the real value.
    It's been a hard day's night and I've been working like a dog.

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    Quote Originally Posted by Tator Tot View Post
    I know environmental factors can cause ripple to be higher than expected, but could something environmental cause it to be lower than expected?

    Also, someone should probably email the reviewer and let him know that their could be an issue with his equipment.
    The noise at switching frequency is often affected by the equipment (decoupling, grounding or so), so by looking at the waveform at 10us timebase you'll know whether the noise gets higher than expected.

    If the value of the decoupling capacitor is too large (100uF for example), the ripple will be lower than expected. Capacitors with different ESR get different results.
    It's been a hard day's night and I've been working like a dog.

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