Hardware Installation- 23 -
• 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.
• These fan headers are not configuration jumper blocks. Do not place a jumper cap on the
headers.
3/4) CPU_FAN/SYS_FAN1/SYS_FAN2(Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN), a 3-pin (SYS_FAN 1) and a 4-pin
(SYS_FAN2) 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.
Pin No. Definition
1 GND
2 Speed Control
3 Sense
4 Speed Control
1
CPU_FAN
CPU_FAN:
Pin No. Definition
1 GND
2 +12V
3 Sense
SYS_FAN1
SYS_FAN2
1
1
SYS_FAN1
5) FDD (Floppy Disk Drive Connector)
This connector is used to connect a floppy disk drive. The types of floppy disk drives supported
are: 360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB. Before connecting a floppy disk drive, be
sure to locate pin 1 of the connector and the floppy disk drive cable. The pin 1 of the cable is
typically designated by a stripe of different color.
1
2
33
34
Pin No. Definition
1 GND
2 Speed Control
3 Sense
4 +5V
SYS_FAN2:
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