Removing An Expansion Card; Adding Memory; Dimm Installation Guidelines; Figure 8-6. Dimms And Dimm Sockets - Dell Precision 400 User Manual

Removing an Expansion Card

Follow this general procedure to remove an expansion
card:
1. If you are removing a non-Plug and Play ISA
expansion card, enter the ICU and remove the
expansion card from your configuration.
See Chapter 4, "Using the ISA Configuration Util-
ity," for instructions.
2. Remove the computer cover according to the
instructions in "Removing the Computer Cover"
in Chapter 7.
CAUTION: See "Protecting Against Electro-
static Discharge" in the safety instructions at
the front of this guide.
3. If necessary, disconnect any cables connected to
the card.
4. Remove the expansion-card cage as instructed in
"Removing the Expansion-Card Cage" in Chap-
ter 7.
5. Position the expansion-card cage with the riser
board lying horizontally on your work surface,
and unscrew the mounting bracket of the card
you want to remove.
6. Grasp the card by its outside corners, and ease it
out of its connector.
7. If you are removing the card permanently, install
a metal filler bracket over the empty card-slot
opening.
NOTE: Installing filler brackets over empty card-
slot openings is necessary to maintain Federal
Communications Commission (FCC) certification of
the system. The brackets also keep dust and dirt out
of your computer.
8-4 Dell Workstation Midsize Systems User's Guide
8. Replace the expansion-card cage in the chassis as
instructed in "Replacing the Expansion-Card
Cage" in Chapter 7.
9. Replace the computer cover, reconnect your com-
puter and peripherals to their power sources, and
turn them on.
A
dding Memory
Dell workstation systems use extended-data out (EDO)
modules that provide error checking and correction
(ECC) capabilities.
Memory can be increased to a maximum of 512 mega-
bytes (MB) by installing combinations of 3.3-volt (V)
16-, 32-, 64-, and 128-MB dual in-line memory modules
(DIMMs) in the four DIMM sockets on the system board.
Figure 8-6 shows the DIMMs and DIMM sockets.

Figure 8-6. DIMMs and DIMM Sockets

DIMM Installation Guidelines

When adding system memory, you may install the 16-,
32-, 64-, and 128-MB DIMMs in any order. For optimum
operation, Dell recommends installing the DIMMs start-
ing with socket A (closest to the edge of the system
board) and working toward socket D, leaving no open
sockets between installed DIMMs.
DIMM
A
B
C
D
DIMM
sockets