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8. Install a filler bracket in the empty card-slot opening. If you are replacing the card, see Installing a PCI Express Graphics Card in a Dual Configuration. 9. Rotate the card retainer back into its original position; push its tip so that its tab clicks into place. 10. If present, lower the card-retention device that lays over the installed cards and snap it into place. 11. Replace the computer cover (see Replacing the Computer Cover) 12. Connect your computer and devices to electrical outlets, and then turn them on. Installing a PCI Express Graphics Card in a Dual Configuration This section pertains to dual PCI Express graphics card configurations only. For installation of other types of PCI or PCI Express cards, see Installing PCI and 1 release tab 2 card retainer 3 alignment guide 4 fan bracket NOTE: If the card is full-length, press the release tab on the end of the alignment guides on the fan bracket. 1 PCI Express x16 card 2 securing tab 3 PCI Express x16 card slot NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep dust and dirt out of your computer. NOTE: The graphics card bridge (not present in all dual-graphics configurations) is not necessary in a single graphics card configuration. 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 the notch 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 or cause 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: To upgrade to or downgrade from a dual-graphics configuration, you will need additional parts that can be ordered from Dell (see "Contacting Dell" in your Owner's Manual). PCI Express Cards. The PCI Express x1 card slot is not available for use if a graphics card is installed in each of the PCI Express x16 card slots in a dual-graphics card configuration. If you are upgrading from a single graphics card to a dual-graphics card configuration, you will need to remove any card installed in the PCI Express x1 card slot (see System Board Components to locate the PCI Express x1 card slot). To remove a PCI Express card, see Removing PCI and PCI Express Cards. To learn more about dual-graphics technology, see "Understanding Dual Graphics Technology" in your Owner's Manual. 1. Follow the procedures in Before You Begin. 2. Remove the computer cover (see Removing 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. 5. Remove the filler bracket or existing graphics card (see Removing a PCI Express Graphics Card from a Dual Configuration) to create a card-slot opening. 6. Prepare the card for installation. See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer. 7. Position the card so that it is aligned with the slot and the securing tab (if present) is aligned with the securing slot. NOTICE: For information about upgrading your system to use NVIDIA SLI (Scalable Link Interface) dual-graphics technology, see the Dell website at support.dell.com. 1 release tab 2 card retainer 3 alignment guide 4 fan bracket NOTE: If you are upgrading to a dual-graphics card configuration and have a card installed in the PCI Express x1 card slot, remove the card (see Removing PCI and PCI Express Cards). NOTE: If the card is full-length, insert the card guide into the alignment slot on the fan bracket. 1 PCI Express x16 card 2 securing tab 3 PCI Express x16 card slot NOTICE: Ensure that you release the securing tab to seat the card. If the card is not installed correctly, you may damage the system board. 8. Gently pull the securing tab (if present) and place the card in the connector. Press down firmly and ensure that the card is fully seated in the slot. 9. Connect any cables that should be attached to the card. See the documentation for the card for information about the card's cable connections. 10. Rotate the card retainer back into its original position; push its tip so that its tab clicks into place. 11. Attach the graphics card bridge (if required for your dual-graphics configuration), pressing firmly so that it completely covers the connector tabs. 12. If present, lower the card-retention device that lays over the installed cards and snap it into place. 13. Replace the computer cover (see Replacing the Computer Cover). 14. Connect your computer and devi...