HP Vectra VE5 2 Supplementary Manual page 14

Internal Features
The main internal features of the HP Vectra VE 5/xx series 2 PC are:
• removable power supply for easy access to system board components
• one internal rear shelf for 3.5-inch devices
• four accessory board slots for accessories (for example, an audio board)
• system board.
Removable Power Supply
Backplane Board
(Four Slots)
System
Board
Internal Rear Shelf:
1-inch high 3.5-inch hard disk drive