Dell Precision T5400 (Late 2007) - Manual (Page 193)

Adding and Replacing Parts 193
11 Press <F2> to enter the system setup program and check the values listed
under Memory Info.
The computer should have changed the value of Installed Memory to
reflect the newly installed memory. Verify the new total. If it is correct, skip
to step 13.
12 If the memory total is incorrect, turn off and disconnect your computer
and devices from their electrical outlets.
Return to step 1 of this procedure, but instead of installing new memory,
check the installed memory modules to ensure that they are seated
properly in their sockets.
13 When the Installed Memory total is correct, press <Esc> to exit system
setup.
14 Run the Dell Diagnostics (see "Dell Diagnostics" on page 136) to verify
that the memory modules are operating properly.
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.
Expansion Card Support
Your Dell™ computer provides the following slots for PCI and PCI Express
cards:
• One PCI card slot
• One PCI Express x16 card slot
• Two PCI Express x8 card slots (wired as x4)
• Two PCI-X card slots