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Chapter 4: Motherboard info
4-14
13. CPU and system fan connectors (4-pin CPU_FAN1/2,
3-pin REAR_FAN1/2, 3-pin FRNT_FAN1/2)
The fan connectors support cooling fans of 350mA~740mA (8.88W
max.) or a total of 2.1A~4.44A (53.28W max.) at +12V. Connect the fan
cables to the fan connectors on the motherboard, making sure that the
black wire of each cable matches the ground pin of the connector.
Do not forget to connect the fan cables to the fan connectors. Lack of
sufficient air flow within the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!
The CPU fan connectors support either a 3-pin or a 4-pin fan cable
plug. Both connectors are slotted to ensure connection in correct
orientation.
NCCH-DL
®
NCCH-DL Fan connectors
GND
Rotation
+12V
CPU_FAN1 REAR_FAN1
GND
Rotation
+12V
FRNT_FAN
2
GND
Rotation
+12V
CPU_FAN2
FRNT_FAN1
GND
Rotation
+12V
REAR_FAN
2
GND
FAN Power
FAN Speed
PWM Control
GND
FAN Power
FAN Speed
PWM Control
CPU_FAN1
CPU_FAN2
REAR_FAN1
REAR_FAN2
FRNT_FAN1
FRNT_FAN2
14. System panel connector (20-pin PANEL1)
This connector accommodates several system front panel functions.
NCCH-DL
®
NCCH-DL System panel connector
PLED-
MLED
PWR
PLED+
+5V
Speaker
PLED
Ground
+5VSB
RESE
T
MLED
Ground
Reset
HD_LED+
HD_LED-
PWR_SW
LAN_LINK
LAN_ACT
Ground
SMI
ExtSMI#
Keylock
Ground
KEYLOCK
SPKR