Dell OptiPlex 755 User Manual page 40

4. If you are installing a card in an empty card connector on the system board, remove the filler bracket to create a card-slot opening at the back of the
computer. Then continue with
5. If you are installing a card to replace one already installed in the computer, remove the installed card (see
6. Prepare the card for installation.
NOTE: See the documentation that came with the card for information on configuring the card, making internal connections, or customizing it for
your computer.
1 release tab on card-retention latch
2 card
3 card-edge connector
4 card connector
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 a PCI Express x16 card, hold the securing-tab release lever away from the card connector as you insert the new card into the
connector slot.
1 PCI Express x16 card
2 release lever
3 securing slot (not all cards)
4 securing tab
5 PCI Express x16 card connector
8. Place the card in the connector and press down firmly. Using the following illustration as a guide, ensure that the card is fully seated in the slot.
step 6.
Removing a PCI Card).