ECS B75H2-AM2 User Manual page 31

ATX12V: ATX 12V Power Connector
Pin Signal Name
1
Ground
2
Ground
3
+12V
4
+12V
INT_SPK: Internal speaker
Pin Signal Name
1
Output_L
3
Output_R
5
GND
7
N/A
Pin Signal Name
2
GND
4
Ground
6
GND
8
VCC
Installing the Motherboard
27