Gigabyte GA-H67A-UD3H-B3 - Page 24

Hardware Installation - 24 -
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) system fans, and a 3-pin power fan. 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 motherboard supports CPU fan speed control, which requires the use of a CPU 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 over-
heating. 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.
CPU_FAN:
PinNo. Denition
1 GND
2 +12V / Speed Control
3 Sense
4 Speed Control
SYS_FAN1:
PinNo. Denition
1 GND
2 +12V / Speed Control
3 Sense
4 Reserve
SYS_FAN1
CPU_FAN
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
1
1
1
SYS_FAN2/PWR_FAN:
PinNo. Denition
1 GND
2 +12V
3 Sense
SYS_FAN2/PWR_FAN