14 <power supply and fan interface – COMMELL MS-C78 User Manual
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MS-C78 User’s Manual
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2.14 <Power Supply and Fan Interface >
2.14.1 <Power Input>
The MS-C78 provides a standard ATX power supply with
24-pin
ATX connector and
additional 12V connector, and the board provides one
4-pin
fan connectors supporting
smart fan for CPU cooler and one 3-pin cooler fan connectors for system and
Northbridge chip. The 4-pin CN_12V additional power connector is necessary for CPU
powering; please connect this well before you finishing the system setup.
Connector: CN_12V
Type: 4-pin standard Pentium 4 additional +12V power connector
Pin
Description
Pin
Description
1 Ground
2 Ground
3 +12V
4 +12V
Connector: ATX
Type: 24-pin ATX power connector
PIN assignment
1 3.3V
13 3.3V
2 3.3V
14 -12V
3 GND
15 GND
4 5V
16 -PSON
5 GND
17 GND
6 5V
18 GND
7 GND
19 GND
8 PW_OK
20 N/C
9 5V_SB
21 5V
10 12V
22 5V
11 12V
23 5V
12 3.3V
24 GND
CN_12V
1
2
3
4
1
12
13
24
ATX