Dell XPS 8930 Service Manual page 41

Figure 17. Rotating the power-supply unit
1 power-supply unit cage release latches (2)
3 chassis
3 Disconnect the CPU-power cable and system board power cable from the system board and the optical-drive power cable from the
optical drive.
For more information, see
4 Disconnect the graphics-card power cables if applicable.
5 Remove the system-board power cable from the routing guide on the chassis.
"System-board components".
2 power-supply unit
4 power-supply unit cage
Removing the power-supply unit 41