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ATX1: ATX 20-pin Power Connector
Pin
Signal Name
1
+3.3V
2
+3.3V
3
Ground
4
+5V
5
Ground
6
+5V
7
Ground
8
PWRGD
9
+5VSB
10
+12V
ATX12V: ATX 12V Power Connector
Pin
Signal Name
1
Ground
2
Ground
3
+12V
4
+12V
SJ1: Single-color LED header
Pin
Signal Name
1
ACPI LED
Pin
Signal Name
2
ACPI LED
3
5VSB
ACPI LED function
S0
Light
Installing the Motherboard
Pin
Signal Name
11
+3.3V
12
-12V
13
Ground
14
PS ON#
15
Ground
16
Ground
17
Ground
18
-5V
19
+5V
20
+5V
S1
S3
S4/S5
Blinking
Blinking
Dark
11
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