ATX Mother Board Pinout

Floppy Drive Power Header Pinout


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This data is provided for legacy systems already deployed. As a rule Floppy drives are no longer shipped with new PC systems.
In general USB Thumb Drives have replaced floppy drives.

8 inch FDD
Internal Floppy Disk Drive

Floppy I/O Interface
The Floppy Drive pin out used on the ATX: series of MotherBoards used to supply power is listed below.
However, the header may not be present on the Mother Board for a number of reasons:
First, the floppy drive may get its power from the Power Supply and not require the header.
Second, the PC may not have shipped with a floppy drive [obsolete technology].



The power connector pinout for the Floppy drive on an ATX mother Board is shown below.
The motherboard may not use a four pin header to supply power to the FDD,
in which case one of the molex cables from the power supply needs to be used.
Refer to the Floppy Drive Data Cable for additional information.




Floppy Power PinOut
Pin # Signal Function Cable
1 +5VDC Red
2 COM Black
3 COM Black
4 +12VDC Yellow


Some computer manufacturers may use non-standard or proprietary components in their systems.
The pinout for the power header listed on this page comply with the ATX specification.
However some companies may use pinouts that differ from the pinout table above.
First try to determine the pin out of the headers listed above from the manual that shipped with the computer,
then use these tables only after checking all other sources of data from the manufacturer.

Electronic Key words: ATX, FDD, Floppy drive, Floppy Disk Drive, Power, Cable Assembly,Bus Standard, Interface Standard,
Specification, Spec, Interface, Physical Interface, Description, Personal Computer Interface, PC, Peripheral Interface, ATX Pinout,
Pin out, Pins, Pin Assignment, Signal Name, Header, Motherboard Pinout, Mother Board, Out-dated, Obsolete.

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Last Modified 1/30/10
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