Dell XPS 420 (Late 2007) - Manual (Page 115)

Removing and Installing Parts
115
6 If you removed a sound card:
a Enter system setup, select Integrated Audio Controller, and then
change the setting to On.
b Connect external audio devices to the audio connectors on the back
panel of the computer.
7 If you removed an add-in network connector:
a Enter system setup, select Integrated NIC Controller, and then
change the setting to On.
b Connect the network cable to the integrated connector on the back
panel of the computer.
PCI Express Cards
Your computer supports:
• One PCI Express x1 card
• One PCI Express x16 card
• One PCI Express x4 card (an x8 card electrically configured as x4)
If you are installing or replacing a PCI Express card, follow the procedures in
the next section. If you are removing but not replacing a card, see "Removing
a PCI Express Card" on page 121.
If you are replacing a card, remove the current driver for the card from the
operating system.
If you are installing or replacing a PCI Express card, see "Installing a PCI
Express Card" on page 116.
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