Gigabyte C621 AORUS XTREME User Manual page 17

7) CPU_OPT (Water Cooling CPU Fan Header)
The fan header is 4-pin and possesses a foolproof insertion design. Most fan headers possess a foolproof
insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black
connector wire is the ground wire). The speed control function requires the use of a fan with fan speed control
design.
1
• 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.
8) BUZZER
The system reports system startup status by issuing a beep code. One single short beep will be heard if
no problem is detected at system startup.
9) EC_TEMP1/EC_TEMP2 (Temperature Sensor Headers)
Connect the thermistor cables to the headers for temperature detection.
EC_TEMP1
1
EC_TEMP2
1
Pin No. Definition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
Pin No. Definition
1 SENSOR IN
2 GND
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