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Thread: This is the latest DC-DC version, correct?

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    Default This is the latest DC-DC version, correct?

    Newegg has the CX550M on sale now for $30 AR. However, when you select it, it states that it's the "Classic Version". See this link for what I mean:

    https://www.newegg.com/Product/Produ...82E16817139147


    I only bring this up because when you go to the non-modular version's page, clicking on the CX550 shows that it's the 2017 version, not the "Classic Version". See this link:

    https://www.newegg.com/Product/Produ...82E16817139202


    I just want to make sure if I pick up the CX550M that it's indeed the latest and greatest with DC-DC and better build quality.

    Thanks!

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    Default

    Any CX series with 450W/550W/650W power rating is the new cool DC-DC one, so you're good. The old ones were 430W/500W/600W.

    It says Classic/2017 because the modular ones appeared in 2015, then the nonmodulars came in 2017.

    The non modular ones also use some newer technology that helps with efficiency and minor things, but they both have DC-DC and that's important.

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    Excellent. I appreciate your help!

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    Default

    The non modular got better fan.

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    Quote Originally Posted by Orion View Post
    The non modular ones also use some newer technology that helps with efficiency and minor things, but they both have DC-DC and that's important.
    What's the point of DC-DC? Efficiency only?

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    Default

    Independent voltage regulation

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    Quote Originally Posted by COFASA View Post
    What's the point of DC-DC? Efficiency only?
    Group regulated power supplies can't maintain stable voltages when a high load on 12V isn't accompanied by a load on 5V, and the opposite. DC-DC power supplies can have 100% load on 12V and 0W on 5V and still be stable, because those two outputs aren't regulated together.

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    Default

    Also DC-DC power supplies support deep sleep states (C6/C7), thanks to above.

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    Quote Originally Posted by rafal_iB_PL View Post
    Also DC-DC power supplies support deep sleep states (C6/C7), thanks to above.
    Well... it can support those sleep states BECAUSE the PSU can support 0A loads.

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