Dell XPS/Dimension XPS Gen 5 - Manual (Page 52)

DC Power Connector FD5
DC Power Connectors HDD0, HDD1, HDD2/Bay, Bay1
DC Power Connectors BAY1 and BAY2
650W Power Supply DC Connector Pin Assignments
NOTE: The P5 connector is intended for use with the PCI Express graphics cards whose power requirements exceed 75 watts.
Pin Number Signal Name 18-AWG Wire Color
1 +5 VDC Red
2 COM Black
3 COM Black
4 +12 VB DC White
Pin Number Signal Name 18-AWG Wire Color
1 +3.3 VDC Orange
2 COM Black
3 +5 VDC Red
4 COM Black
5 +12 VA DC Yellow
Pin Number Signal Name 18-AWG Wire Color
1 +12 VB DC White
2 COM Black
3 COM Black
4 +5V DC Red