Dell OptiPlex 755 User Manual page 112

5 If you are installing a new card, remove the filler bracket to create an empty card-slot opening.
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. Grasp the card by its corners, and ease it out of its
connector.
NOTE:
See the documentation that came with the card for information on configuring the card, making
internal connections, or customizing it for your computer.
6 Prepare the new card for installation.
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 Press the release tab to raise the card-retention latch.
1
112
Expansion Cards
1
release tab
2 card-retention latch
3
card
2
4
card-edge connector
5 card connector
3
4
5