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Thread: Power Supply without the 3.3V rail connected on the SATA plugs

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    Quote Originally Posted by Jon Gerow View Post
    Correct. Those are adapters though. This is just TT being cheap.
    Does 3.3v have a use? does anything use 3.3v?
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    Quote Originally Posted by ehume View Post
    Does 3.3v have a use? does anything use 3.3v?
    Pretty sure RAM and microsata cards use 3.3v, only because *something* has to use 3.3v

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    Quote Originally Posted by ehume View Post
    Does 3.3v have a use? does anything use 3.3v?
    3.3v is used by RAM, some logic circuits, and PCI-e has it apart of their standard.

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    To be fair, I don't know what on the SATA cable uses +3.3V.

    Motors use +12V. Logic uses +5V. Since SSD's are "solid state", they only use +3.3V. So why do we have +3.3V on the SATA at all?

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    Quote Originally Posted by Jon Gerow View Post
    To be fair, I don't know what on the SATA cable uses +3.3V.

    Motors use +12V. Logic uses +5V. Since SSD's are "solid state", they only use +3.3V. So why do we have +3.3V on the SATA at all?
    From what I've been told, 3.3v originally was added in the SATA spec for laptop drives. I don't know if Laptop drives still use 3.3v anymore. I do know that some NAS drives used to need 3.3v for HotSwap functionality.

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    Hi...try not to figure you can include the voltage up like that to get 18.3v

    You can gather negative voltage and positive voltage into a single unit to make a bigger distinction.. in any case, all sure voltage can be included that way..
    With respect to the 3.3v I don't have the foggiest idea why it is there...
    I have 9 HD's in my machine and just one of them is utilizing the SATA power connector from my PSU with the 3.3v on it,..
    The rest are utilizing standard molex to sata power converter...

    I'm simply considering what the 3.3 volt line is for since not having it doesn't appear to influence the usefulness of my drives.

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    Quote Originally Posted by KevonLaity View Post
    Hi...try not to figure you can include the voltage up like that to get 18.3v

    You can gather negative voltage and positive voltage into a single unit to make a bigger distinction.. in any case, all sure voltage can be included that way..
    With respect to the 3.3v I don't have the foggiest idea why it is there...
    I have 9 HD's in my machine and just one of them is utilizing the SATA power connector from my PSU with the 3.3v on it,..
    The rest are utilizing standard molex to sata power converter...

    I'm simply considering what the 3.3 volt line is for since not having it doesn't appear to influence the usefulness of my drives.
    Not sure if this is span. So I'm just going to close this thread.

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