Gigabyte GA-990FX-Gaming User Manual page 15

3/4/5) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN), a 4-pin (SYS_FAN1) and a 3-pin (SYS_FAN2)
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:
Pin No.
1
1
2 +12V/Speed Control
CPU_FAN
3 Sense
4 Speed Control
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.
6) SATA3 0/1/2/3/4/5 (SATA 6Gb/s Connectors)
The SATA connectors conform to SATA 6Gb/s standard and are compatible with SATA 3Gb/s and SATA
SATA3 0 2 4
1 3 5
7
7
SYS_FAN1:
Pin No.
1
SYS_FAN1
Pin No.
1
1
SYS_FAN2
Pin No.
1
2 TXP
1 3 TXN
4
1
5
6
7
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1
2 Speed Control
3 Sense
4 VCC
1
2 +12V
3 Sense