7. Install a filler bracket in the empty card-slot opening. If you are replacing the card, see Installing PCI and PCI Express Cards.8. Rotate the card retainer back into its original position; push its tip so that its tab clicks into place.9. If present, lower the card-retention device that lays over the installed cards and snap it into place.10. Replace the computer cover (see Replacing the Computer Cover).11. Connect you computer and devices to electrical outlets, and then turn them on.12. Uninstall the driver for the card that you removed.Installing PCI and PCI Express Cards1. Follow the procedures in Before You Begin.2. Remove the computer cover (see Replacing the Computer Cover).3. If present, press the tab on the card retention device that lays over the installed cards and rotate it upwards to gain full access to the card.4. Press down the tab on the top of the card retainer at the appropriate card slot and pivot the card retainer back through the chassis wall.1 PCI Express x16 card 2 securing tab 3 PCI Express x16 card slotNOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keepdust and dirt out of your computer.NOTICE: Before rotating the card retainer back into place, ensure that the tops of all cards and filler brackets are flush with the alignment bar and thenotch in the top of each card or filler bracket fits around the alignment guide.NOTICE: Do not route card cables over or behind the cards. Cables routed over the cards can prevent the computer cover from closing properly orcause damage to the equipment.NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug the cable into the computer.NOTE: If you removed a sound card or a network adapter, see Network Adapter and Sound Card Settings.NOTICE: To avoid electrostatic discharge and damage to internal components, ground yourself by using a wrist grounding strap or by periodicallytouching an unpainted metal surface on the computer chassis.NOTICE: If you did not order a graphics card with your computer, Dell has provided a PCI graphics card for troubleshooting purposes. Removal of thecard is not necessary when installing additional graphics cards; however, if you remove the card, store it in a safe and secure location for future use.NOTICE: If you have or are upgrading to the optional dual-graphics configuration, see Installing a PCI Express Graphics Card in a Dual Configuration toinstall a graphics card.