Removing A Dimm; Microprocessor Upgrades; Adding Or Replacing A Microprocessor; Figure 8-7. Installing A Dimm - Dell Precision 400 User Manual

Use the following procedure to install a DIMM (see Fig-
ure 8-7):
1. Locate the plastic securing clips at each end of the
socket. Press the clips outward until they snap
open.
2. Press the DIMM straight down into the slot run-
ning down the center of the socket until the
securing tabs snap into place around the ends of
the DIMM.
securing
clips (2)

Figure 8-7. Installing a DIMM

Removing a DIMM

To remove a DIMM, press the securing clips outward
simultaneously until the DIMM disengages from the
socket (see Figure 8-8). It should pop up slightly.

Figure 8-8. Removing a DIMM

8-6 Dell Workstation Midsize Systems User's Guide
2.
1.
M
icroprocessor Upgrades
To take advantage of future options in speed and func-
tionality, you can add a second processor or replace either
the primary or secondary processor.
CAUTION: The second processor must be of the
same type and speed as the first processor.
Each processor and its associated L2 (level-2) cache
memory are contained in an SEC cartridge that is
installed in a dedicated socket on the system board. In
systems with only one processor, a terminator card is
installed in the secondary processor socket. The follow-
ing subsection describes how to install or replace an SEC
cartridge in either the primary or secondary processor
socket.

Adding or Replacing a Microprocessor

The following items are included in a microprocessor
upgrade kit:
•
The new processor SEC cartridge with attached heat
sink
•
Two heat sink securing thumbscrews
NOTE: Dell recommends that only a technically knowl-
edgeable person perform this procedure.
1. 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.
2. Rotate the power supply as described in "Rotat-
ing the Power Supply Away From the System
Board" in Chapter 7.
3. Remove the airflow shroud from the processor(s).
Squeeze both pairs of tabs on top of the shroud and
lift it up and away from the processor SEC car-
tridge(s) (see Figure 8-9).