Gigabyte GA-G1975X Manual - Page 23
CPU_FAN / SYS_FAN / PWR_FAN Cooler Fan Power Connector, PCIE_12V Power Connector - fans
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English 3) PCIE_12V (Power Connector) The PCIE_12V power connector supplies extra power to the PCIE x 16 slot. Connect this connector depending on your system requirements. 1 PIin No. 1 2 3 4 Definition NC GND GND +12V 4/5/6) CPU_FAN / SYS_FAN / PWR_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 foolproof 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 Pin No. 1 2 3 4 Definition GND +12V Sense Speed Control (Only for CPU_FAN) SYS_FAN / PWR_FAN - 23 - Hardware Installation