Gigabyte GA-VM900MC Manual - Page 21

CPU_FAN/SYS_FAN Fan Headers, FDD Floppy Disk Drive Connector - mb

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English 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. 1 CPU_FAN CPU_FAN : Pin No. 1 2 3 4 Definition GND +12V / Speed Control Sense Speed Control 1 SYS_FAN SYS_FAN : Pin No. 1 2 3 Definition GND +12V 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. 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. 33 1 34 2 - 21 - Hardware Installation

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Hardware Installation
- 21 -
English
•
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.
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.
Pin No.
Definition
1
GND
2
+12V / Speed Control
3
Sense
4
Speed Control
CPU_FAN :
Pin No.
Definition
1
GND
2
+12V
3
Sense
SYS_FAN :
1
CPU_FAN
SYS_FAN
1
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.
1
2
33
34