Dell Precision T7400 User's Guide - Page 180

Install memory modules in order of their labels on the system board; matched sets of four should be installed first into DIMM_1 on each board and then DIMM_2 on each board, and so on. NOTICE: Do not install non-ECC, unbuffered, or non-fully-buffered memory modules. Doing so may cause the system not to boot. Installing Memory (With Optional Memory Riser Cards) CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover. NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer. 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). 180 Adding and Replacing Parts