Gigabyte GA-MA74GM-S2H User Manual page 23

3/4) CPU_FAN/SYS_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 4-pin (SYS_FAN) system fan
headers. 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.
• 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.
5) 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.
1
CPU_FAN
1
SYS_FAN
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2
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CPU_FAN:
Pin No. Definition
1 GND
2 +12V/Voltage Control
3 Sense
4 Speed Control
SYS_FAN:
Pin No. Definition
1 GND
2 +12V/Voltage Control
3 Sense
4 NC
33
1
Hardware Installation