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atx power supply question...

hi all,


ok, so straight to the point, does negative rail in almost all atx power supply still being used?

both of the -12v and -5v...




so basically i want to make a mini dc-dc atx power supply like those hd plex power supply, but upon making schematic i remember that atx power supply is having a negative rail, and when searching on googling it i found a bunch of mixing answer from that negative rail is basically obsolete to they still 'exist' but never used anymore




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-5V hasn't been in the ATX standard for 15 years or so.


-12V is not used much anymore but is still in the ATX standard. You more than likely don't need it.

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