Next steps1. Install the main power interposer board.Installing the main power interposer boardPrerequisitesFollow the safety guidelines listed in Safety instructions on page 27.Steps1. Align the screw holes on the main power interposer board (PIB) with the holes on the system chassis.2. Using the Phillips #2 screwdriver, secure the main PIB to the system using the screws.3. Connect all the disconnected power cables to the main PIB.Figure 125. Installing the main power interposer boardNext steps1. If removed, install the GPU PIB.2. Install the system board.3. Install the power supply units.4. Follow the procedure listed in After working inside your system on page 28.Converting the system from tower mode to rack modeYour system can be converted from the tower mode to the rack mode.To convert your system from the tower mode to the rack mode, you require the tower to rack conversion kit, which containsthe following:● Rack ears (left and right) with three screws each● VGA module● VGA cable● Rack slide cover● Mylar coverConverting the system from tower mode to rack modePrerequisites1. Follow the safety guidelines listed in Safety instructions on page 27.2. Follow the procedure listed in Before working inside your system on page 28.Installing and removing system components 129