4 Upgrading your computer68Note: Make sure that the other ends of the disk cables are securelyconnected to their corresponding connectors on the mainboard.4 Replace the side panel. See "To replace the side panel" on page 59.Installing an expansion cardTo install an expansion card:1 Remove the side panel (see page 58).2 Locate an empty PCI Express or PCI slot on the mainboard.3 Remove the lock that holds the bracket to the computer.4 Pull out the bracket on the housing opposite the selected empty slot.5 Remove the expansion card from its protective packaging.6 Align the card with the empty bracket and then insert it into the slot.Make sure that the card is properly seated.7 Secure the card to your computer with the bracket lock youremoved earlier.8 Replace the side panel. See "To replace the side panel" on page 59.When you turn on the computer, BIOS automatically detects and assignsresources to the newly installed devices.