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Hardware Installation
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3/4) CPU_FAN/SYS_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 3-pin (SYS_FAN) 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 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.
CPU_FAN
DEBUG
PORT
G.QBOFM
1
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 configuration jumper blocks. Do not place a jumper cap on the
•
headers.
SYS_FAN
1
CPU_FAN:
SYS_FAN:
Pin No.
Definition
1
GND
2
+12V
3
Sense
4
Speed Control
Pin No.
Definition
1
GND
2
+12V
3
Sense
5) CLR_CMOS (Clearing CMOS Jumper)
Use this jumper to clear the CMOS values (e.g. date information and BIOS configurations) and reset
the CMOS values to factory defaults. To clear the CMOS values, place a jumper cap on the two pins to
temporarily short the two pins or use a metal object like a screwdriver to touch the two pins for a few
seconds.
Always turn off your computer and unplug the power cord from the power outlet before clear-
•
ing the CMOS values.
After clearing the CMOS values and before turning on your computer, be sure to remove the
•
jumper cap from the jumper. Failure to do so may cause damage to the motherboard.
After system restart, go to BIOS Setup to load factory defaults (select
•
Load Optimized De-
faults
) or manually configure the BIOS settings (refer to Chapter 2, "BIOS Setup,
" for BIOS
configurations).
Open: Normal
Short: Clear CMOS Values
