Dell OptiPlex GX745 - DC Power Connectors

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11. Replace the optical drive (see Optical Drive).
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12. Connect the AC power cable to the connector.
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13. Replace the computer cover (see Replacing the Computer Cover).
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DC Power Connectors
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DC Power Connector P1
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Pin Number
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Signal name
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18-AWG Wire
1
+3.3 VDC
Orange
2
+3.3 VDC
Orange
3
GND
Black
4
+5 VDC
Red
5
GND
Black
6
+5 VDC
Red
7
GND
Black
8
PS_PWRGOOD*
Gray
9
P5AUX
Purple
10
+12 VDC
White
11
+12 VDC
White
12
+3.3 VDC
Orange
13
+3.3 VDC/SE
Orange
14
+12 VDC*
Blue
15
GND
Black
16
PWR_PS_ON*
Green
17
GND
Black
18
GND
Black
19
GND
Black
20
NC
NC
21
+5 VDC
Red