Dell Dimension 5000 Service Manual page 20

If necessary, disconnect any cables connected to the card. If your card includes a retention mechanism, remove the top of the retention mechanism by
pressing the tab and pulling up on the top. Gently pull the securing tab, grasp the card by its top corners, and then ease it out of its connector.
1 PCI Express x16 card slot
2 PCI Express x16 card
3 securing tab
4 PCI Express x1 card
5 PCI Express x1 card slot
6. 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.
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.
NOTICE: Ensure that you release the securing tab to unseat the card. If the card is not removed correctly, the system board may be damaged.
8. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.
1 alignment bar
2 alignment guide
3 fully seated card
4 not fully seated card
5 bracket within slot
6 bracket caught outside of slot
9. If you replaced a card that was already installed in the computer and you removed the retention mechanism, you may reinstall the retention mechanism.
10. Before replacing 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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