EVGA P55, 121-LF-E652 Connecting Serial ATA Cables, Pin ATX Power PW1, Pin ATX 12V Power PW12

24-pin ATX Power (PW1)

PW1 is the main power supply connector located along the edge of the board next to the DIMM slots. Make sure that the power supply cable and pins are properly aligned with the connector on the motherboard. Firmly plug the power supply cable into the connector and make sure it is secure.

PW1 connector

Plug power cable from system power supply to PW1

Figure 1. PW1 Motherboard Connector

Table 1. PW1 Pin Assignments

Connector		Pin	Signal	Pin	Signal
		1	+3.3V	13	+3.3V
1	12	2	+3.3V	14	-12V
		3	GND	15	GND
		4	+5V	16	PS_ON
		5	GND	17	GND
13	24	6	+5V	18	GND
		7	GND	19	GND
		8	PWROK	20	RSVD
		9	+5V_AUX	21	+5V
		10	+12V	22	+5V
		11	+12V	23	+5V
		12	+3.3V	24	GND

8-pin ATX 12V Power (PW12)

PW12, the 8-pin ATX 12V power connection, is used to provide power to the CPU. Align the pins to the connector and press firmly until seated.

Connecting Serial ATA Cables

The Serial ATA II connector is used to connect the Serial ATA II device to the motherboard. These connectors support the thin Serial ATA II cables for