Hardware Installation - 24 -
3/4) CPU_FAN/SYS_FAN1/2/3/4 (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN), a 4-pin (SYS_FAN1/2) and the 3-pin (SYS_
FAN3/4) system fan headers. 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.
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.
•
CPU_FAN:
SYS_FAN1:
SYS_FAN3/4:
Pin No.
1 GND
2 +12V /Speed Control
3 Sense
4 Speed Control
Pin No.
1 GND
2 +12V /Speed Control
3 Sense
4 Reserve
Pin No.
1 GND
2 +12V
3 Sense
5) BAT (Battery)
in the CMOS when the computer is turned off. Replace the battery when the battery voltage drops to a low
level, or the CMOS values may not be accurate or may be lost.
You may clear the CMOS values by removing the battery:
Turn off your computer and unplug the power cord.1.
Gently remove the battery from the battery holder and wait for one minute. 2.
(Or use a metal object like a screwdriver to touch the positive and negative
terminals of the battery holder, making them short for 5 seconds.)
Replace the battery. 3.
Plug in the power cord and restart your computer.4.
Always turn off your computer and unplug the power cord before replacing the battery. •
Replace the battery with an equivalent one. Danger of explosion if the battery is replaced with •
an incorrect model.
Contact the place of purchase or local dealer if you are not able to replace the battery by yourself •
or uncertain about the battery model.
When installing the battery, note the orientation of the positive side (+) and the negative side (-) •
of the battery (the positive side should face up).
Used batteries must be handled in accordance with local environmental regulations. •
CPU_FAN
SYS_FAN1/2
SYS_FAN3/4
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