Dell PowerVault 745N - Manual (Page 44)

The system board holds the system's control circuitry and other electronic components. Several hardware options such as the processor and memory are
installed directly on the system board. Using a riser board, the system can accommodate up to two expansion cards. The upper slot supports PCI 32-bit, 33-
MHz (5.0-V) expansion cards and the lower slot supports PCI-X 64-bit, 66-MHz (3.3-V) expansion cards.
The hard-drive bays provide space for up to four SATA hard drives. Power is supplied to the system board, hard drives, and internal peripherals through a
single nonredundant power supply.
Removing and Replacing the Bezel
To access the hard drives or the front USB connector, you must first remove the system's bezel. To remove the bezel, push the bezel release latches inward
and pull the bezel away from the system. See
Figure 5 -2 .
Figure 5-2. Installing and Removing the Bezel
To replace the bezel, push the latches inward, place the bezel on the front of the system and release the latches.
Opening the System
NOTE: The connectors on 64-bit cards are longer than the 32-bit PCI connector in the system. However, as long as the card is installed properly, the
card will still function.