Gigabyte Understanding m55s PCIE_12V Power and PWR_FAN Connections

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3)PCIE_12V (Power Connector)

The PCIE_12V power connector supplies extra power to the PCIE x16 slot. Connect this connector depending on your system requirements.

1

PIin No.	Definition
1	NC
2	GND
3	GND
4	+12V

4/5/6) CPU_FAN / SYS_FAN / PWR_FAN (Cooler Fan Power Connector)

The cooler fan power connector supplies a +12V power voltage via a 3-pin/4-pin (only for CPU_FAN) power connector and possesses a foolproof connection design.

Most coolers are designed with color-coded power connector wires. A red power connector wire indicates a positive connection and requires a +12V power voltage. The black connector wire is the ground wire (GND).

Remember to connect the CPU/system/power fan cable to the CPU_FAN/SYS_FAN/PWR_FAN connector to prevent CPU damage or system hanging caused by overheating.

	CPU_FAN :
1	Pin No.	Definition
	1	GND
CPU_FAN
	2	+12V / Speed Control
	3	Sense
1	4	Speed Control
SYS_FAN	SYS_FAN / PWR_FAN :
	Pin No.	Definition
	1	GND
	2	+12V
	3	Sense
1
PWR_FAN

GA-M55S-S3 (rev. 2.0) Motherboard - 20 -