Dell OptiPlex 755 User Manual page 148

6. While pressing the lever, pull the card up and out of the card connector.
1 PCI Express x16 card 2 lever
4 securing tab 5 PCI Express x16 card connector
7. While pressing the lever, pull the removal pull tab up and remove the card out of the card connector.
1 PCI Express x16 DVI-card
4 lever
7 PCI Express x16 card connector
8. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets keep dust
and dirt out of your computer and maintain the airflow that cools your computer.
9. Before you close the card retention mechanism, ensure that:
The tops of all cards and filler brackets are flush with the alignment bar.
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The notch in the top of the card or filler bracket fits around the alignment guide.
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10. Secure any remaining card(s) by closing the card retention latch and snapping it into place.
NOTICE: Do not route card cables over the cards. Cables routed over the cards can prevent the computer cover from closing properly or cause damage
to the equipment.
11. Replace the computer cover (see
12. Uninstall the card's driver. See the documentation that came with the card for instructions.
13. If you removed a sound card:
a. Enter system setup, select Integrated Audio from the Onboard Devices group, and change the setting to On (see
b. Connect external audio devices to the audio connectors on the back panel of the computer.
3 securing slot (not all cards)
2 removal pull tab 3 DVI card connector
5 securing slot 6 securing tab
Replacing the Computer Cover).
System Setup).