Dell GX280DT - GX280 Desktop Computer User Manual page 103

b. With your free hand, gently squeeze the sides of the retention mechanism to release it from the tab slots holding it in place.
c. Pivot the retention mechanism upward to release it from the two tab slots.
4. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 6.
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. 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.
6. Prepare the new 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.
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.
7. 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 the
securing tab.
8. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.
1 PCI Express x16 card
2 lever
3 securing slot (not all cards)
4 securing tab
5 PCI Express x16 card connector
1 fully seated card
2 not fully seated card
3 bracket within slot
4 bracket caught outside of slot