4-22 CRU Replacement and Server Upgrades
Replacing or Adding DIMMs
The following subsections provide the procedures for configuring and upgrading
system memory. Use these procedures when replacing or adding dual inline
memory modules (DIMMs) to your system. When adding or changing memory
in a CPU module the same changes must be must be made to the other CPU
module to provide total system redundancy and mirroring.
The CPU board contains four DIMM sockets (see Figure 4-23). DIMMs should
be installed in the four sockets starting from the lowest number (DIMM#1) to
the highest number (DIMM#4). Each 168-pin socket can hold a single 72-bit
DIMM module with 256MB and 512MB of memory.
Note:
When replacing or upgrading DIMMs the
replacement DIMMs must be of the same specifications of
all the installed DIMMs.
!
CAUTION
Electrostatic discharge (ESD) can damage components;
place them on an antistatic surface. Add or replace DIMMs
on the CPU board using an antistatic wrist strap attached to
chassis ground.
B
C
D
E
F
A
Cooling Fan #1
B
DIMM #1
C
DIMM #2
D
DIMM #3
E
DIMM #4
F
Cooling Fan #2
Figure 4-23. CPU Board Component Layout
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