PC Power Supply Voltage Data and Connector Types
Power for Internal Peripheral Devices
Four Pin Molex Power Connector
Molex Drive Connector
Typically used for 5¼ drives such as CD Rom and DVD Drives. Used for legacy IDE, EIDE, and ATA Hard Drives.
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Serial ATA Power Connector
Berg Floppy Power Connector
AMP 171822-4
Typically used for 3½ floppy disk drives.
Six Pin PCI Express Power Connector
PCI Express GFX Connector
MOLEX 39-01-2060
Three Pin Molex KK Type Connector
Typically used for internal cooling fans.
Power for the Motherboard and CPU
Motherboard Power Connector Types
The eight power supply form factors are:
- PC / XT
- AT/Desk
- AT/Tower
- Baby AT
- LPX
- ATX
- NLX
- SFX
Three common ATX power to motherboard connector configurations, a 20 pin connector, a 20 +4 pin connector, and a 24 pin connector. The 20 +4 may be used for either 20 pin connector motherboards or 24 pin connector motherboards. The first 20 pins are a consistent standard on all three configurations. Technically, even the 24 pin male power connector can be used on a 20 pin motherboard by allowing the four extra to hang off the side, given there is room (one one motherboard example a capacitor is in the way.)
20 Pin ATX Power
20+4 Pin ATX Power
MOLEX 39-01-2240
24 Pin ATX Power
Eight Pin CPU Power Connector
MOLEX 39-01-2080
Required connector for modern dual CPU motherboards
AMP ATX 12v Power Connector
AMP 1-480424-0
4 pin connector for the Intel Pentium 4 CPU