Dell Studio XPS 8100 (Late 2009) - Manual (Page 11)

8. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
Replacing PCI and PCI Express Cards
1. Follow the procedures in Before You Begin .
2. Prepare the 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.
3. Place the PCI Express card in the slot on the system board and press down firmly. Ensure that the PCI Express card is fully seated in the slot.
4. Replace the card retention bracket (see Replacing the Card Retention Bracket ).
1 card retention clamp 2 screw
3 filler bracket 4 card retention clamp insert
5 PCI Express card
NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep
dust and dirt out of your computer.
1 PCI Express x1 card 2 PCI Express x1 card slot
3 PCI Express x16 card slot 4 PCI Express x16 card