Dell Precision T3400 (Late 2007) - Manual (Page 152)

152
Adding and Replacing Parts
DC Power Connector P7
DC Power Connectors P8, P9, P13, and P14
Pin Number Signal name 22-AWG Wire
1 +5 VDC Red
2 COM Black
3 COM Black
4 +12 VADC Yellow
Pin Number Signal name 18-AWG Wire
1 +3.3 VDC Orange
2 COM Black
3 +5 VDC Red
4 COM Black
5 +12 VBDC White