ECS P55H-A2, User Manual, Page: 30 / 84

24
Installing the Motherboard
Make sure to connect a 4-pin ATX power cable to ATX4P; otherwise, the
system will be unstable.
ATX_ POWER: ATX 24-pin Power Connector
Pin Signal Name Pin Signal Name
1
+3.3V
13
+3.3V
2
+3.3V
14
-12V
3
Ground
15
Ground
4
+5V
16
PS_ON
5
Ground
17
Ground
6
+5V
18
Ground
7
Ground
19
Ground
8
PWRGD
20
-5V
9
+5VSB
21
+5V
10
+12V
22
+5V
11
+12V
23
+5V
12
+3.3V
24
Ground
PWR_FAN: FAN Power Connector
Pin Signal Name Function
1
GND
System Ground
2
+12V
Power +12V
3 Sense Sensor
ATX12V: ATX 12V Power Connector
Pin Signal
Pin Signal
1 Ground 3 +12V
2 Ground 4 +12V