Gigabyte GA-VM900MC User Manual page 21

3/4) CPU_FAN/SYS_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 3-pin power fan header (SYS_FAN).
Each fan header supplies a +12V power voltage and possesses a foolproof insertion design. When
connecting a fan cable, be sure to connect it in the correct orientation. Most fans are designed with
color-coded power connector wires. A red power connector wire indicates a positive connection
and requires a +12V voltage. 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, locate
the foolproof groove on the connector.
CPU_FAN :
Pin No.
1
CPU_FAN
SYS_FAN :
Pin No.
1
SYS_FAN
33
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Definition
1 GND
2 +12V / Speed Control
3 Sense
4 Speed Control
Definition
1 GND
2 +12V
3 Sense
1
2
Hardware Installation