Dell Precision T7400 (Late 2007) - Manual (Page 195)

Adding and Replacing Parts 195
If you are installing or replacing a PCI, PCI Express, or PCI-X card, see
"Installing an Expansion Card" on page 195. If you are removing but not
replacing a PCI, PCI Express, or PCI-X card, see "Removing an Expansion
Card" on page 202.
Before installing a card, see the documentation that came with the card for
information on configuring the card, making internal connections, or
otherwise customizing it for your computer. If you are replacing a card,
uninstall the existing driver for the card.
Installing an Expansion Card
1 Follow the procedures in "Before You Begin" on page 139.
CAUTION: Your computer is heavy (it has an approximate minimum weight of 55
lbs) and can be difficult to maneuver. Seek assistance before attempting to lift,
move, or tilt it; this computer requires a two-man lift. Always lift correctly to avoid
injury; avoid bending over while lifting. See your
Product Information Guide for
other important safety information.
CAUTION: The computer stand should be installed at all times to ensure
maximum system stability. Failure to install the stand could result in the computer
tipping over, potentially resulting in bodily injury or damage to the computer.
2 Remove the computer cover (see "Removing the Computer Cover" on
page 141).
3 Press the tabs on either end of the card retention device and lift to remove
it from the computer.