Dell Precision T7400 User's Guide - Page 216

One PCI card slot and two PCI Express x8 (wired as x4) card slots are not available for use if a graphics riser card is installed for the dual-graphics configuration. Instead, an additional PCI Express x16 slot is available for the second card in the dual-graphics configuration. If you are upgrading from or downgrading to a single graphics to a dual-graphics configuration, you will need additional parts. Contact Dell to obtain optional upgrade or downgrade parts (see "Contacting Dell" on page 287). See "System Board Components" on page 27 to locate the PCI Express x1 card slot. To remove a PCI Express card, see "Removing an Expansion Card" on page 202. 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). 216 Adding and Replacing Parts