Gigabyte GA-HA65M-D2H-B3 (REV. 1.0) [23/104] 4 cpu_fan sys_fan fan headers

- 23 - Hardware Installation

3/4) CPU_FAN/SYS_FAN (Fan Headers)

The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 4-pin (SYS_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 con-

trol, 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.

5) BAT (Battery)

Thebatteryprovidespowertokeepthevalues(suchasBIOScongurations,date,andtimeinformation)

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:

1. Turn off your computer and unplug the power cord.

2. Gently remove the battery from the battery holder and wait for one minute.

(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.)

3. Replace the battery.

4. Plug in the power cord and restart your computer.

• 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 bat-

tery 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:

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

DEBUG

PORT

G.QBOFM