Dell OptiPlex 755 - Manual (Page 104)

4. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 5.
5. 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.
6. If your card includes a card retention bar, remove the bar. Gently pull the securing tab, grasp the card by its top corners, and ease it out of its
connector.
7. Prepare the new card for installation.
8. If you are installing the card into the x16 card connector, position the card so that the securing slot is aligned with the securing tab, and gently pull the
securing 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 latch 2 alignment guide 3 card
4 card-edge connector 5 card connector 6 release tab
NOTE: See the documentation that came with the card for information on configuring the card, making internal connections, or customizing it for your
computer
CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be
sure to unplug your computer from its electrical outlet before installing any cards.
1 PCI Express x16 card 2 lever 3 securing slot (not all cards)
4 securing tab 5 PCI Express x16 card connector