Explanation of icon.
Output connector for ATX Mother Board
Function name:Output connector for ATX Mother Board

This is the main power connector for a ATX mother board, and has 20 poles.

This is supported by the mother board of ATX 12 V pre-version 2.0 (ver.1.3). The way of the pin assignment is as follows.

Pin. No
Output
Pin. No
Output
1
+3.3V
11
+3.3V
2
+3.3V
12
-12V
3
COM
13
COM
4
+5V
14
PS_ON#
5
COM
15
COM
6
+5V
16
COM
7
COM
17
COM
8
PWR_OK
18
-5V or NC
9
+5VSB
19
+5V
10
+12V
20
+5V