User`s manual

- 21 - Hardware Installation
• 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congurationjumperblocks.Donotplaceajumpercapontheheaders.
3/4/5/6) CPU0_FAN/SYS_FAN1/SYS_FAN2/SYS_FAN3 (CPU Fan/System Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU0_FAN), and three 4-pin (SYS_FAN1/SYS_
FAN2/SYS_FAN3) 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. Denition
1 GND
2 +12V
3 Sense
4 Speed Control
1
1
CPU0_FAN
SYS_FAN1/2/3
CPU0_FAN/SYS_FAN1/2/3:
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
7) PWR_DET (PMBus connector)
5
1
PinNo. Denition
1 SMB CLK
2 SMB DATA
3 SMB Alert
4 GND
5 3.3V Sense
CPU0_FAN
SYS_FAN3 SYS_FAN2
SYS_FAN1