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2804040 User’s Manual Hardware Setup
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 PS_ON
5 GND 17 GND
6 5V 18 GND
7 GND 19 GND
8 PW_OK 20 -5V
9 5V_SB 21 5V
10 12V 22 5V
11 12V 23 5V
12 3.3V 24 GND
Connector: CN_12V
Type: 4-pin standard Pentium 4 additional +12V power connector
Pin Description Pin Description
1 Ground 2 +12V
3 Ground 4 +12V
5 Ground 6 +12V
7 Ground 8 +12V
Connector: CPUFAN
Type: 4-pin fan wafer connector
Pin Description Pin Description
1 Ground 2 +12V
3 Fan Speed Detection 4 Sense
Connector: NBFAN, SYSFAN
Type: 3-pin fan wafer connector
Pin Description Pin Description Pin Description
1 Ground 2 +12V 3 Sense
Power and Fan Installation 29