GIGABYTE Z790 UD AC LGA 1700 ATX Motherboard - Manual (Page 23)

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• 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.
3/4) CPU_FAN/SYS_FAN1/2A/2B (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.
5) SYS_FAN3_PUMP (System Fan/Water Cooling Pump Header)
The fan/pump 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. For optimum heat dissipation, it is recommended that a system fan be installed
inside the chassis. The header also provides speed control for a water cooling pump. Please navigate to
the "BIOS Setup" page of GIGABYTE's website and search for "Smart Fan 6" for more information.
DEBUG PO
RT
G.QBOFM
1
CPU_FAN
DEBUG
PORT
G.QBOFM
1
DEBUG
PORT
G.QBOFM
1
SYS_FAN1/2A/2B
Pin No. Definition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
Pin No. Definition
1 GND
2 Voltage Speed Control
3 NC
4 PWM Speed Control
CPU_FAN/SYS_FAN1/2A:
SYS_FAN2B:
Pin No. Definition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control