IMB520 / 521 LGA1151 ATX Motherboard
18
Board and Pin Assignments
2.5.15
Power Input Connectors (ATX1 and CN26)
Steady and sufficient power can be supplied to all components on the motherboard by
connecting the power connector. Please make sure all components and devices are
properly installed before connecting the power connector.
An external power supply plug fits into ATX1 and CN26 in only one orientation. Properly
press down power supply plug until it completely and firmly fits into the connector. Loose
connection may cause system instability.
ATX1 CPU power input connector:
CN26 24-pin power input connector:
Pin ATX1 Signal
Pin
ATX1 Signal
1
GND
5
+12V
2
GND
6
+12V
3
GND
7
+12V
4
GND
8
+12V
Pin CN26 Signal
Pin CN26 Signal
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
PWR OK
20
-5V
9
5VSB
21
+5V
10
+12V
22
+5V
11
+12V
23
+5V
12
3.3V
24
GND
1
4
5
8
1
12
13
24
