DC Connectors and Pinout
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ATX 24-pin
Provides power to the motherboard.
Pin
Signal
Pin
1
+3.3 VDC
13
2
14
+3.3 VDC
3
COM
15
4
+5 VDC
16
5
17
COM
6
+5 VDC
18
7
COM
19
8
PWR OK
20
9
+5 VSB
21
10
+12 VDC
22
11
+12 VDC
23
12
+3.3 VDC
24
5
Signal
+3.3 VDC
-12 VDC
COM
PS_ON
COM
COM
COM
Reserved N/C
+5 VDC
+5 VDC
+5 VDC
COM
PCI-E 8-pin [6+2]
Provides power to high-performance
graphics cards – can be split into 6-pin
and 2-pin connectors for use with graphics
cards that require 6-pin connectors, or used
together for graphics cards that
require 8-pin connectors.
Pin
Signal
Pin
Signal
1
+12 VDC
5
COM
2
+12 VDC
6
COM
3
+12 VDC
7
COM
4
8
COM
COM
ATX12V [4+4]
Provides power to modern CPUs – can be split into
two 4-pin connectors, for compatibility with older
motherboards and systems with limited power consumption.
Note: Some motherboards, typically dual processor systems,
may require a secondary 12V connector – refer to
the motherboard manual for details and connector locations.
Pin
Signal
Pin
Signal
1
COM
5
+12 VDC
2
6
COM
+12 VDC
3
COM
7
+12 VDC
4
COM
8
+12 VDC
SATA
Provides power to modern
hard drives, optical drives
and other devices that
require a SATA power cable.
Pin
1
N/C
2
COM
3
+5 VDC
4
COM
5
+12 VDC
Signal