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PCI Expansion Card

Discussion in 'General Electronics' started by oxy, Dec 14, 2003.

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  1. oxy

    oxy Guest

    Hi all:
    Before i ask some guestions about power supply in MB for PCI card.
    I still have a question about that I usually see PCI card used 5v for
    power supply source.
    But if there are all 3.3V components in my PCI card , so i don't want
    add a power regulator to transfer 5v to 3.3v .
    So can i only use 3.3v pin in PCI card?
    (i saw 3.3v pin is workable in PCI spec 2.2 )

    PS:I affraid of it's wrong that i don't use 5v pin and use power
    regulator to suppy 3.3v component power.......
    if anyone cah tell me,wrong or true?

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