Dell Precision T3400 (Late 2007) - Manual (Page 157)

Adding and Replacing Parts
157
5 Connect your computer and devices to electrical outlets, and then turn
them on.
Resetting the Chassis Intrusion Detector
1 Enter System Setup (see "Entering System Setup" on page 81).
2 Use the up- or down-arrow keys to highlight the Chassis Intrusion menu
option, then press <Enter>.
3 Use the left- or right-arrow keys to select Reset.
4 Change the setting to On, On-Silent, or Off.
NOTE:
The default setting is On-Silent.
5 Press <Esc>.
6 Press the left- and right-arrow keys to highlight Save/Exit, and then press
<Enter> to exit System Setup and restart your computer.
Memory
For information on the type of memory supported by your computer, see
"Specifications" on page 31.
NOTICE:
Before you install new memory modules, download the most recent BIOS
for your computer from support.dell.com.
Memory Overview
• Memory modules should be installed in pairs of matched memory size,
speed, and technology. If the memory modules are not installed in matched
pairs, the computer will continue to operate, but with a slight reduction in
performance. See the label in the upper-right corner of the module to
determine the module’s capacity.