Gigabyte Z790I AORUS ULTRA User Manual page 19

3) EXT_PWR
(Note 1)
_
Connect one end of the EXT_PWR cable to this connector and the other end to your power supply.
_
4/5) CPU_FAN/SYS_FAN1/SYS_FAN2
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
B_
optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.
(Note 1) The connector is on the front of GC-Z790I BTB PLUG.
_ _B
(External Power Connector)
S F_
S S_F
B
_
(Note 1)
F_USB3
_
_
1
B_
F
(Fan Headers)
F_USB30 3
1
CPU_FAN
Fan power extension
cable
SYS_FAN1/
SYS_FAN2
- 19 -
S _
Pin No. Definition
1 VCC
2 GND
3 GND
4 +12V
Pin No. Definition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
1
_
_ 0
_3