ATX12V 4-Pin CPU Power Connector (P4)
4-pin auxiliary +12V connector defined by the ATX12V specification, supplying dedicated power to the CPU voltage regulator on motherboards, the predecessor to the 8-pin EPS12V connector.
Aliase:P4 Connector, ATX12V 4-Pin, CPU Power Connector, 12V4
ATX12V 4-Pin Female Connector (Cable Side, Front View)
4 Pins
Pinout Table4
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | GND | Ground | Ground Return for +12V1 |
| 2 | GND | Ground | Ground Return for +12V2 |
| 3 | +12V1 | Power | +12V DC Power Rail 1 (CPU VRM Supply) |
| 4 | +12V2 | Power | +12V DC Power Rail 2 (CPU VRM Supply) |