Gigabyte B550 UD AC - Page 15

5) 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.
DEBUG PORT
G.QBOFM
1
Pin No. Denition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
3/4) CPU_FAN/SYS_FAN1/2/3 (Fan Headers)
All fan headers on this motherboard are 4-pin. 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. For
optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.
• 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 conguration jumper blocks. Do not place a jumper cap on the headers.
Pin No. Denition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
CPU_FAN
SYS_FAN1
SYS_FAN3
SYS_FAN2
DEBUG
PORT
G.QBOFM
DEBUG PORT
G.QBOFM
1
1
DEBUG PORT
G.QBOFM
1
DEBUG
PORT
G.QBOFM
1
Connector CPU_FAN SYS_FAN1~3 CPU_OPT
Maximum Current 2A 2A 2A
Maximum Power 24W 24W 24W
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