IBM 849130u Installation Guide - Page 21

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 turning 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 the ServerProven list at http://www.ibm.com/servers/eserver/serverproven/compat/us/ for a list of memory modules 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. The BIOS displays the total amount of installed memory and the amount of configured memory. v The server comes with one 512 MB DIMM installed in DIMM connector 1. If one DIMM is installed, when you install an additional DIMM, it must be installed in DIMM connector 3, and it must be the same size, speed, type, and technology as the DIMM that is installed in DIMM connector 1. You can mix compatible DIMMs from various manufacturers. The third and fourth DIMMs must be installed as a pair, in DIMM connectors 2 and 4. v If you install a pair of DIMMs in DIMM connectors 2 and 4, 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. However, the size, speed, type, and technology of the DIMMs that you install in DIMM connectors 2 and 4 must match each other. v Install only 1.8 V, 240-pin, double-data-rate II (DDR II), PC4200, unbuffered synchronous dynamic random-access memory (SDRAM) with error correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest PC4200 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). Chapter 2. Installing options 9

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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
turning
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
the
ServerProven
list
at
for
a
list
of
memory
modules
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.
The
BIOS
displays
the
total
amount
of
installed
memory
and
the
amount
of
configured
memory.
v
The
server
comes
with
one
512
MB
DIMM
installed
in
DIMM
connector
1.
If
one
DIMM
is
installed,
when
you
install
an
additional
DIMM,
it
must
be
installed
in
DIMM
connector
3,
and
it
must
be
the
same
size,
speed,
type,
and
technology
as
the
DIMM
that
is
installed
in
DIMM
connector
1.
You
can
mix
compatible
DIMMs
from
various
manufacturers.
The
third
and
fourth
DIMMs
must
be
installed
as
a
pair,
in
DIMM
connectors
2
and
4.
v
If
you
install
a
pair
of
DIMMs
in
DIMM
connectors
2
and
4,
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.
However,
the
size,
speed,
type,
and
technology
of
the
DIMMs
that
you
install
in
DIMM
connectors
2
and
4
must
match
each
other.
v
Install
only
1.8
V,
240-pin,
double-data-rate
II
(DDR
II),
PC4200,
unbuffered
synchronous
dynamic
random-access
memory
(SDRAM)
with
error
correcting
code
(ECC)
DIMMs.
These
DIMMs
must
be
compatible
with
the
latest
PC4200
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).
Chapter
2.
Installing
options
9