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ATX PC floppy power connector specification users reports and reviews

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CORRECTPC floppy power connector pinout

I suggest that you add a remark to this page that this pinout is correct but some sources incorrectly give the floppy connector the same pinout numbers as the large molex connector. I know one major book that is into a large number of editions that was incorrect until a year or two ago.

Perhaps you should call it (small drive connector) as well for clarity.

Floppy Drive Connector
(Small Drive Connector)

1 +5V Red
2 GND Black
3 GND Black
4 +12V Yellow

NOTE: Colours are the same as the large Molex connector but pin numbers are different.

Hard Drive Connecter
(Large Drive Connector - Molex)

1 +12V Yellow
2 GND Black
3 GND Black
4 +5V Red

ERROR FIXEDThe connector is actually called a 4 pin Berg plug, the pin-outs are correct however.APPROVED
2008-10-26 01:57:42rev. 1CORRECTAlso used for PCI Express cards, etc.APPROVED
2010-02-26 04:18:41rev. 1CORRECTAPPROVED
2010-05-25 13:41:01rev. 1CORRECTAPPROVED
2010-09-04 23:40:48rev. 1CORRECTAPPROVED
2013-05-28 04:40:44rev. 1CORRECT+12V is generally not used, but there anyway.APPROVED
2017-01-16 09:20:14rev. 2CORRECTCorrect. both grounds are the same, though.APPROVED
2022-11-17 03:58:13rev. 2CORRECTAPPROVED
2023-05-20 10:46:16rev. 2CORRECTAPPROVED
2024-04-29 02:47:41rev. 2CORRECTAPPROVED

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Back to ATX PC floppy power connector pinout

Pinouts.ru > Pinout of PC floppy power connector and layout of 4 pin Mini-Molex (Berg plug) connector
should be correct