ECS A790GXM-A, Manual, Page: 31 / 88

27
Installing the Motherboard
ATX4P1: Auxiliary Power Connector for Graphics Interface
Pin Signal Name
4
+12V
3
GND
2
GND
1
NC
Make sure to connect a 4-pin ATX power cable to ATX4P1; otherwise,
the system will be unstable.
ATX12V: ATX 12V Power Connector
Pin Signal Name
4
Ground
3
Ground
2
Ground
1
Ground
Pin Signal Name
5
+12V
6
+12V
7
+12V
8
+12V
SPK: Internal speaker
Pin Signal Name
1
VCC
2
Key
3
NC
4
Signal
ATX_POWER: ATX 24-pin Power Connector
1
+3.3V
13
+3.3V
2
+3.3V
14
-12V
3
Ground
15
COM
4
+5V
16
PS_ON
5
Ground
17
COM
6
+5V
18
COM
7
Ground
19
COM
8
PWRGD
20
-5V
9
+5VSB
21
+5V
10
+12V
22
+5V
11
+12V
23
+5V
12
+3.3V
24
COM
Pin Signal Name Pin Signal Name