Dell Precision T5400 (Late 2007) - Manual (Page 171)

Adding and Replacing Parts 171
DC Power Connector P3
DC Power Connector P5
Pin Number Signal name 18-AWG Wire
1 COM Black
2 12 VC Blue/White
3 12 VC Blue/White
4 COM Black
5 COM Black
6 5 V Red
7 5 V Red
8 3.3 V Orange
9 12 VC Blue/White
10 COM Black
11 COM Black
12 5 V Red
7 8 9 10 11 12
1 2 3 4 5 6
4 5 6
1 2 3