24-pin ATX12V 2.x power supply connector (20-pin omits the last 4: 11, 12, 23 and 24)
Color |
Signal |
Pin |
Pin |
Signal |
Color
|
Orange
|
+3.3 V
|
1
|
13
|
+3.3 V
|
Orange
|
+3.3 V sense
|
Brown
|
Orange
|
+3.3 V
|
2
|
14
|
−12 V
|
Blue
|
Black
|
Ground
|
3
|
15
|
Ground
|
Black
|
Red
|
+5 V
|
4
|
16
|
Power on
|
Green
|
Black
|
Ground
|
5
|
17
|
Ground
|
Black
|
Red
|
+5 V
|
6
|
18
|
Ground
|
Black
|
Black
|
Ground
|
7
|
19
|
Ground
|
Black
|
Grey
|
Power good
|
8
|
20
|
−5 V (obsolete)
|
White
|
Purple
|
+5 V standby
|
9
|
21
|
+5 V
|
Red
|
Yellow
|
+12 V
|
10
|
22
|
+5 V
|
Red
|
Yellow
|
+12 V
|
11
|
23
|
+5 V
|
Red
|
Orange
|
+3.3 V
|
12
|
24
|
Ground
|
Black
|
|