3. Gently push the release tab on the card retention door from the inside to pivot the door open. Because the door is captive, it will remain in the openposition.4. If your computer includes a card retention mechanism, to secure the x16 card in place from the top:a. Pivot the mechanism upward and gently squeeze in on the sides to release the mechanism from the two tab slots holding it in place.b. Set the retention mechanism aside in a secure location.5. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 6.6. If you are replacing a card that is already installed in the computer, remove the card.If necessary, disconnect any cables connected to the card. If your computer includes a card retention mechanism, remove the top of the retentionmechanism by pressing the tab and pulling up on the top. Gently pull the securing tab, grasp the card by its top corners, and then ease it out of itsconnector.7. 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 yourcomputer.8. If you are installing the card into the x16 card connector, position the card so the securing slot is aligned with the securing tab, and gently pull thesecuring tab.9. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.1 card retention door2 card retention mechanism3 release tabs (2)1 securing tab 4 PCI Express x16 card slot2 PCI Express x1 card 5 PCI Express x16 card3 PCI Express x1 card slotCAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, besure to unplug your computer from its electrical outlet before installing any cards.NOTICE: Ensure that you release the securing tab to unseat the card. If the card is not removed correctly, the system board may be damaged.