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Thread: Can the experts here explain the rails?

  1. #1
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    Default Can the experts here explain the rails?

    Specifically the 3.3V and 5.5V rail and the -12V rail? Also, what components use what rails?
    VS

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    Default

    Parts that use 3.3v:
    M2 slot
    Microsata
    Ram slots
    Motherboard logic
    Some International Rectifier Digital VRM designs
    PCI-E/PCI/AGP slots
    Parts that use 5V:
    Usb ports
    PCI/AGP/ISA slots
    Logic chips on motherboard/disk drive logic etc.
    RGB LED1!1!1!1
    Old processors (Athlon XP/Pentium III)

    Parts that use the -12v rail:
    Pci Slots

    -5v rail user:
    Some soundcards on the socket 7 platform
    Last edited by Burning Epoxy; 10-01-2018 at 10:15 AM. Reason: Typo
    I am where all the magic smoke is.

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    Default

    Quote Originally Posted by Burning Epoxy View Post
    Parts that use the -12v rail:
    Pci Slots
    Some soundcards
    There's one -12V pin on the PCI slot and nobody's ever used it.

    It's the -5V that some sound cards used to use (back in socket 7 days).

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