PC Interfaces 101

Power Connectors And ATX Standards

The various types of power connections are shown in the following tables and illustrations.

Peripheral device connector

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AMD
Socket 462
Power Supply StandardATX12V 1.3 or higher
ATX plug20-pin
AUX plug (6-pin)not used
P4 connector (4-pin 12V)rarely used
Socket 754
Power Supply StandardATX12V 1.3 or higher
ATX plug20-pin, sometimes 24-pin
AUX plug (6-pin)not used
P4 connector (4-pin 12V)sometimes needed
Socket 939
Power Supply StandardATX12V 1.3 or higher
ATX plug20-pin, sometimes 24-pin
AUX plug (6-pin)not used
P4 connector (4-pin 12V)sometimes needed
Intel
Socket 370
Power Supply StandardATX12V 1.3 or higher
ATX plug20-pin
AUX plug (6-pin)rarely used
P4 connector (4-pin 12V)rarely used
Socket 423
Power Supply StandardATX12V 1.3 or higher
ATX plug20-pin
AUX plug (6-pin)rarely used
P4 connector (4-pin 12V)needed
Socket 478
Power Supply StandardATX12V 1.3 or higher
ATX plug20-pin
AUX plug (6-pin)not used
P4 plug (4-pin 12V)needed
Socket 775
Power Supply StandardATX12V 2.01 or higher
ATX plug24-pin, sometimes 20-pin
AUX plug (6-pin)n/a
P4 plug (4-pin 12V)needed
P4 plug (8-pin 12V)945X chipset (DualCore) or higher often needs this connection

ATX plug with 24 pins (Extented ATX)

20-pin ATX motherboard connector

20-pin ATX cable

6-pin EPS connector

Uwe Scheffel