Dell Dimension 4500S - Manual (Page 50)

DC Power Connector P1
DC Power Connector P6
Pin Number Signal name 18-AWG Wire
1 +3.3 VDC Orange
2 +3.3 VDC Orange
3 COM Black
4 +5 VDC Red
5 COM Black
6 +5 VDC Red
7 COM Black
8 POK* Gray
9 +5 VFP Purple
10 +12 VDC Yellow
11 +3.3 VDC Orange
12 – 12 VDC* Blue
13 COM Black
14 PS ON* Green
15 COM Black
16 COM Black
17 COM Black
18 N/C N/C
19 +5 VDC Red
20 +5 VDC Red
* Use 22-AWG wire instead of 18-AWG wire