Gigabyte GA-8S661FXM-775 Manual - Page 19

CPU_FAN / SYS_FAN Cooler Fan Power Connector

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English 3/4) CPU_FAN / SYS_FAN (Cooler Fan Power Connector) The cooler fan power connector supplies a +12V power voltage via a 3-pin/4-pin (only for CPU_FAN) power connector and possesses a fool-proof connection design. Most coolers are designed with color-coded power connector wires. A red power connector wire indicates a positive connection and requires a +12V power voltage. The black connector wire is the ground wire (GND). Please remember to connect the power to the cooler to prevent system overheating and failure. Caution! Please remember to connect the power to the CPU fan to prevent CPU overheating and failure. 1 CPU_FAN 1 SYS_FAN Pin No. 1 2 3 4 Definition GND +12V Sense Speed Control (Only for CPU_FAN) - 19 - Hardware Installation

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Hardware Installation
- 19 -
English
3/4)
CPU_FAN / SYS_FAN (Cooler Fan Power Connector)
The cooler fan power connector supplies a +12V power voltage via a 3-pin/4-pin (only for
CPU_FAN) power connector and possesses a fool-proof connection design.
Most coolers are designed with color-coded power connector wires. A red power connector
wire indicates a positive connection and requires a +12V power voltage. The black connector
wire is the ground wire (GND).
Please remember to connect the power to the cooler to prevent system overheating and
failure.
Caution! Please remember to connect the power to the CPU fan to prevent CPU overheating
and failure.
1
CPU_FAN
SYS_FAN
1
Pin No.
Definition
1
GND
2
+12V
3
Sense
4
Speed Control
(Only for CPU_FAN)