Gigabyte C621 AORUS XTREME User Manual page 16

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3) OC_PEG_1/OC_PEG_2 (PCIe Power Connectors)
The power connectors provide auxiliary power to the onboard PCI Express x16 slots. When two or more
graphics cards are installed, we recommend that you connect the power cables from the power supply to
the connectors to ensure system stability.
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4/5) CPU_FAN/SYS_FAN1/2/3/4 (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.
CPU_FAN/SYS_FAN4
6) SYS_FAN5/6_PUMP (System Fan/Water Cooling Pump Headers)
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, refer to Chapter 2, "BIOS Setup,"
"M.I.T.," for more information.
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6 4
3 1
1
SYS_FAN1/SYS_FAN2
1
1
SYS_FAN5_PUMP SYS_FAN6_PUMP
• 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.
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Pin No. Definition
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B
1
2
3
F_USB3 F
4
5
6
Pin No. Definition
1
1
2
3
4
SYS_FAN3
Pin No. Definition
1
2
1
3
4
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+12V
+12V
+12V
GND
GND
GND
GND
Voltage Speed Control
Sense
PWM Speed Control
GND
Voltage Speed Control
Sense
PWM Speed Control