IBM 326m Hardware Maintenance Manual - Page 52

Installing, memory, module

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Installing a memory module The following notes describe the types of dual inline memory modules (DIMMs) that your server supports and other information that you must consider when installing DIMMs: v Your server uses interleaved dual inline memory modules (DIMMs), which you must add, remove, or replace in pairs. Each pair must be of the same type, capacity, and speed. The server comes with one pair of DIMMs installed in DIMM slots 1 and 2 on the system board. v You can increase the amount of memory in the server by replacing the installed DIMMs with higher-capacity DIMMs or by installing additional pairs of DIMMs. v To optimize system performance in a single-microprocessor configuration, install DIMMs in the following sequence: DIMM pair 1 2 DIMM slots 1 and 2 3 and 4 v To optimize system performance in a dual-microprocessor configuration, install DIMMs in the following sequence: DIMM pair 1 2 3 4 DIMM slots 1 and 2 7 and 8 3 and 4 5 and 6 v The server supports 512 MB, 1 GB, and 2 GB DIMMs. The memory can be expanded to a maximum of 16 GB using PC3200 2 GB DIMMs. See the ServerProven® list at http://www.ibm.com/servers/eserver/serverproven/compat/us/ for a list of memory modules that the server supports. Important:The amount of memory installed must be the same for each microprocessor. For example, if you want to install four 1 GB DIMMs and four 512 MB DIMMs, install one pair of 1 GB DIMMs and one pair of 512 MB DIMMs for each microprocessor so that the total amount of memory for each microprocessor equals 3 GB of RAM. 42 326m Type 7969: Hardware Maintenance Manual and Troubleshooting Guide

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Installing
a
memory
module
The
following
notes
describe
the
types
of
dual
inline
memory
modules
(DIMMs)
that
your
server
supports
and
other
information
that
you
must
consider
when
installing
DIMMs:
v
Your
server
uses
interleaved
dual
inline
memory
modules
(DIMMs),
which
you
must
add,
remove,
or
replace
in
pairs.
Each
pair
must
be
of
the
same
type,
capacity,
and
speed.
The
server
comes
with
one
pair
of
DIMMs
installed
in
DIMM
slots
1
and
2
on
the
system
board.
v
You
can
increase
the
amount
of
memory
in
the
server
by
replacing
the
installed
DIMMs
with
higher-capacity
DIMMs
or
by
installing
additional
pairs
of
DIMMs.
v
To
optimize
system
performance
in
a
single-microprocessor
configuration,
install
DIMMs
in
the
following
sequence:
DIMM
pair
DIMM
slots
1
1
and
2
2
3
and
4
v
To
optimize
system
performance
in
a
dual-microprocessor
configuration,
install
DIMMs
in
the
following
sequence:
DIMM
pair
DIMM
slots
1
1
and
2
2
7
and
8
3
3
and
4
4
5
and
6
v
The
server
supports
512
MB,
1
GB,
and
2
GB
DIMMs.
The
memory
can
be
expanded
to
a
maximum
of
16
GB
using
PC3200
2
GB
DIMMs.
See
the
ServerProven
®
list
at
for
a
list
of
memory
modules
that
the
server
supports.
Important:
The
amount
of
memory
installed
must
be
the
same
for
each
microprocessor.
For
example,
if
you
want
to
install
four
1
GB
DIMMs
and
four
512
MB
DIMMs,
install
one
pair
of
1
GB
DIMMs
and
one
pair
of
512
MB
DIMMs
for
each
microprocessor
so
that
the
total
amount
of
memory
for
each
microprocessor
equals
3
GB
of
RAM.
42
326m
Type
7969:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide