Dell XPS 600 - Manual (Page 87)

Removing and Installing Parts
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4 If you are upgrading to a dual-graphics configuration and have a card installed in the PCI
Express x1 card slot, remove the card. See "Removing PCI and PCI Express Cards" on
page 89.
5 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.
6 Position the card so that it is aligned with the slot and the securing tab (if present) is aligned
with the securing slot.
NOTICE:
Ensure that you release the securing tab to seat the card. If the card is not installed correctly,
you may damage the system board.
7 Gently pull the securing tab (if present) and place the card in the connector. Press down
firmly and ensure that the card is fully seated in the slot.
PCI Express
x16 card
PCI Express x16
card slot
securing tab