PC Power Connectors
(used inside the pc case)
There are two main power connectors used within the PC. These are used to provide power to a whole range of drives and additional internal peripherals. These include floppy disk drives, hard disk drives, CD/DVD Drives and tape streamers. They use a connector called a Molex for the larger drives and a mini molex for smaller ones , in particular the floppy disk drive.
3.5"
Floppy Disk Drive Connector
Pin
Name
Color
Description
1
+5V
Red
+5 VDC
2
GND
Black
+5 V Ground
3
GND
Black
+12 V Ground
(Same as +5 V Ground)
4
+12V
Yellow
+12 VDC
4 pin Mini Molex Connector
5.25"
Floppy Drive / Hard Disk Drive and Misc Peripheral Connector