Gigabyte Essential Guide to CPU_FAN, PWR_FAN, SYS_FAN1, and SYS_FAN2 Headers

CPU_FAN:

3/4/5) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers)

The motherboard has a 4-pin CPU fan header (CPU_FAN), two 3-pin system fan headers (SYS_FAN1 and SYS_FAN2), and a 3-pin power fan header (PWR_FAN). Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The motherboard supports CPU fan speed control, which requires the use of a CPU fan with fan speed control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.

				Pin No.	Definition
				1	GND
1				2	+12V / Speed Control
				3	Sense
	CPU_FAN
				4	Speed Control
				SYS_FAN1/SYS_FAN2:
1				Pin No.	Definition
	1		1	GND
				2	+12V
SYS_FAN1		SYS_FAN2
				3	Sense
				PWR_FAN
				Pin No.	Definition
			1	1	GND
				2	+12V
	PWR_FAN
				3	Sense

•Be sure to connect fan cables to the fan headers to prevent your CPU and system from

overheating. Overheating may result in damage to the CPU or the system may hang.

• These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers.

6)FDD (Floppy Disk Drive Connector)

This connector is used to connect a floppy disk drive. The types of floppy disk drives supported are: 360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB. Before connecting a floppy disk drive, be sure to locate pin 1 of the connector and the floppy disk drive cable. The pin 1 of the cable is typically designated by a stripe of different color.

33	1
34	2

- 23 - Hardware Installation