IBM 419452u Installation Guide - Page 28

Installing, memory, module

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Cover-release button 4. Press the cover-release button. 5. Slide the cover back approximately 1.27 cm (0.5 inches); then, lift it off the server. Attention: For proper cooling and airflow, replace the cover before you turn on the server. Operating the server for extended periods of time (more than 30 minutes) with the cover removed might damage server components. Installing a memory module The following notes describe the types of dual inline memory modules (DIMMs) that the server supports and other information that you must consider when installing DIMMs: v The server supports 512 MB, 1 GB, and 2 GB DIMMs, for a maximum of 8 GB of system memory. See http://www.ibm.com/servers/eserver/serverproven/compat/ us/ for a list of memory modules that you can use with the server. v The amount of usable memory will be reduced depending on the system configuration. A certain amount of memory must be reserved for system resources. Use the system summary in the Configuration/Setup Utility program to view the total amount of installed memory and the amount of configured memory (see "Using the Configuration/Setup Utility program" on page 32). v The server comes with one 512 MB or 1 GB DIMM installed in DIMM connector 1 and an identical DIMM (the same size, speed, type, and technology) installed in DIMM connector 3. v If you install a pair of DIMMs in DIMM connectors 2 and 4, the size, speed, type, and technology of the DIMMs that you install in DIMM connectors 2 and 4 must match each other. However, they do not have to be the same size, speed, type, and technology as the DIMMs that are installed in DIMM connectors 1 and 3. v You can use compatible DIMMs from various manufacturers in the same pair. v Install only double-data-rate II (DDR II), PC2-5300, unbuffered synchronous dynamic random-access memory (SDRAM) with error correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest PC2-5300 SDRAM unbuffered DIMM specification. v If you install a pair of 2 GB DIMMs and a pair of other-size DIMMs, the 2 GB DIMMs must be installed as the first pair (in DIMM connectors 1 and 3). v When you restart the server after you add or remove a DIMM, a message is displayed indicating that the memory configuration has changed. 14 IBM System x3250 M2 Types 4190 and 4194: Installation Guide

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Cover-release
button
4.
Press
the
cover-release
button.
5.
Slide
the
cover
back
approximately
1.27
cm
(0.5
inches);
then,
lift
it
off
the
server.
Attention:
For
proper
cooling
and
airflow,
replace
the
cover
before
you
turn
on
the
server.
Operating
the
server
for
extended
periods
of
time
(more
than
30
minutes)
with
the
cover
removed
might
damage
server
components.
Installing
a
memory
module
The
following
notes
describe
the
types
of
dual
inline
memory
modules
(DIMMs)
that
the
server
supports
and
other
information
that
you
must
consider
when
installing
DIMMs:
v
The
server
supports
512
MB,
1
GB,
and
2
GB
DIMMs,
for
a
maximum
of
8
GB
of
system
memory.
See
us/
for
a
list
of
memory
modules
that
you
can
use
with
the
server.
v
The
amount
of
usable
memory
will
be
reduced
depending
on
the
system
configuration.
A
certain
amount
of
memory
must
be
reserved
for
system
resources.
Use
the
system
summary
in
the
Configuration/Setup
Utility
program
to
view
the
total
amount
of
installed
memory
and
the
amount
of
configured
memory
(see
“Using
the
Configuration/Setup
Utility
program”
on
page
32).
v
The
server
comes
with
one
512
MB
or
1
GB
DIMM
installed
in
DIMM
connector
1
and
an
identical
DIMM
(the
same
size,
speed,
type,
and
technology)
installed
in
DIMM
connector
3.
v
If
you
install
a
pair
of
DIMMs
in
DIMM
connectors
2
and
4,
the
size,
speed,
type,
and
technology
of
the
DIMMs
that
you
install
in
DIMM
connectors
2
and
4
must
match
each
other.
However,
they
do
not
have
to
be
the
same
size,
speed,
type,
and
technology
as
the
DIMMs
that
are
installed
in
DIMM
connectors
1
and
3.
v
You
can
use
compatible
DIMMs
from
various
manufacturers
in
the
same
pair.
v
Install
only
double-data-rate
II
(DDR
II),
PC2-5300,
unbuffered
synchronous
dynamic
random-access
memory
(SDRAM)
with
error
correcting
code
(ECC)
DIMMs.
These
DIMMs
must
be
compatible
with
the
latest
PC2-5300
SDRAM
unbuffered
DIMM
specification.
v
If
you
install
a
pair
of
2
GB
DIMMs
and
a
pair
of
other-size
DIMMs,
the
2
GB
DIMMs
must
be
installed
as
the
first
pair
(in
DIMM
connectors
1
and
3).
v
When
you
restart
the
server
after
you
add
or
remove
a
DIMM,
a
message
is
displayed
indicating
that
the
memory
configuration
has
changed.
14
IBM
System
x3250
M2
Types
4190
and
4194:
Installation
Guide