Gigabyte GA-946-DS3 Manual - Page 23

/5 CPU_FAN/SYS_FAN/PWR_FAN Fan Headers, NB_FAN North Bridge Fan Header

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English 3/4/5) CPU_FAN/SYS_FAN/PWR_FAN (Fan Headers) The motherboard has a 4-pin CPU fan header (CPU_FAN), a 3-pin system fan header (SYS_FAN), and a 3-pin power fan header (PWR_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 Definition GND +12V / Speed Control 1 PWR_FAN 1 SYS_FAN 3 Sense 4 Speed Control SYS_FAN / PWR_FAN: Pin No. Definition 1 GND 2 +12V 3 Sense 6) NB_FAN (North Bridge Fan Header) Connect the North Bridge fan cable to this header. The fan header has 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. Pin No. Definition 1 GND 2 +12V 1 3 NC • Be sure to connect fan cables to the fan headers to prevent your CPU, North Bridge and system from overheating. Overheating may result in damage to the CPU/North Bridge or the system may hang. • These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers. - 23 - Hardware Installation

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Hardware Installation
- 23 -
English
3/4/5) CPU_FAN/SYS_FAN/PWR_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN), a 3-pin system fan header (SYS_FAN),
and a 3-pin power fan header (PWR_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 / PWR_FAN:
6)
NB_FAN (North Bridge Fan Header)
Connect the North Bridge fan cable to this header. The fan header has 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 connec-
tion and requires a +12V voltage. The black connector wire is the ground wire.
1
•
Be sure to connect fan cables to the fan headers to prevent your CPU, North Bridge and
system from overheating. Overheating may result in damage to the CPU/North Bridge or
the system may hang.
•
These fan headers are not configuration jumper blocks. Do not place a jumper cap on the
headers.
Pin No.
Definition
1
GND
2
+12V
3
NC
1
CPU_FAN
SYS_FAN
1
PWR_FAN
1