IBM 43635gu Installation Guide - Page 27

Installing, memory, module

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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 you install DIMMs: v The server supports industry-standard, 667 MHz, unbuffered PC2-5300, double-data-rate 2 (DDR2) dual inline memory modules (DIMMs) error correcting code (ECC) memory. v The system board contains four DIMM connectors and supports two-way memory interleaving. v The DIMM options that are available for the server are 512 MB, 1 GB, and 2 GB. The server supports a minimum of 512 MB and a maximum of 8 GB of system memory. v The server comes with one 512 MB DIMM or two 512 MB DIMMs installed. 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. To view the total amount of installed memory and the amount of configured memory, run the Configuration/Setup Utility program and select System Summary from the menu. For additional information, see the User's Guide on the IBM System x Documentation CD. v For two-way memory interleaving, DIMMs must be installed in matched pairs. If one DIMM is installed in the DIMM 1 connector, when you install an additional DIMM, it must be installed in the DIMM 3 connector, and it must be the same size, speed, type, and technology as the DIMM in the DIMM 1 connector. You can mix compatible DIMMs from various manufacturers. If you install a second pair of DIMMs in the DIMM 2 and DIMM 4 connectors, they do not have to be the same size, speed, type, and technology as the DIMMs in the DIMM 1 and DIMM 3 connectors. However, the size, speed, type, and technology of the DIMMs that you install in the DIMM 2 and DIMM 4 connectors must match each other. v Install only 1.8 V, 240-pin, double-data-rate 2 (DDR2), 667 MHz, PC2-5300, unbuffered synchronous dynamic random-access memory (SDRAM) with error correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest DDR2 667 MHz SDRAM unbuffered DIMM specification. For a list of supported optional devices for the server, see http://www.ibm.com/servers/eserver/ serverproven/compat/us/. v When you restart the server after you add or remove a DIMM, the server displays a message that the memory configuration has changed. Chapter 2. Installing optional devices 13

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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
you
install
DIMMs:
v
The
server
supports
industry-standard,
667
MHz,
unbuffered
PC2-5300,
double-data-rate
2
(DDR2)
dual
inline
memory
modules
(DIMMs)
error
correcting
code
(ECC)
memory.
v
The
system
board
contains
four
DIMM
connectors
and
supports
two-way
memory
interleaving.
v
The
DIMM
options
that
are
available
for
the
server
are
512
MB,
1
GB,
and
2
GB.
The
server
supports
a
minimum
of
512
MB
and
a
maximum
of
8
GB
of
system
memory.
v
The
server
comes
with
one
512
MB
DIMM
or
two
512
MB
DIMMs
installed.
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.
To
view
the
total
amount
of
installed
memory
and
the
amount
of
configured
memory,
run
the
Configuration/Setup
Utility
program
and
select
System
Summary
from
the
menu.
For
additional
information,
see
the
User’s
Guide
on
the
IBM
System
x
Documentation
CD.
v
For
two-way
memory
interleaving,
DIMMs
must
be
installed
in
matched
pairs.
If
one
DIMM
is
installed
in
the
DIMM
1
connector,
when
you
install
an
additional
DIMM,
it
must
be
installed
in
the
DIMM
3
connector,
and
it
must
be
the
same
size,
speed,
type,
and
technology
as
the
DIMM
in
the
DIMM
1
connector.
You
can
mix
compatible
DIMMs
from
various
manufacturers.
If
you
install
a
second
pair
of
DIMMs
in
the
DIMM
2
and
DIMM
4
connectors,
they
do
not
have
to
be
the
same
size,
speed,
type,
and
technology
as
the
DIMMs
in
the
DIMM
1
and
DIMM
3
connectors.
However,
the
size,
speed,
type,
and
technology
of
the
DIMMs
that
you
install
in
the
DIMM
2
and
DIMM
4
connectors
must
match
each
other.
v
Install
only
1.8
V,
240-pin,
double-data-rate
2
(DDR2),
667
MHz,
PC2-5300,
unbuffered
synchronous
dynamic
random-access
memory
(SDRAM)
with
error
correcting
code
(ECC)
DIMMs.
These
DIMMs
must
be
compatible
with
the
latest
DDR2
667
MHz
SDRAM
unbuffered
DIMM
specification.
For
a
list
of
supported
optional
devices
for
the
server,
see
serverproven/compat/us/.
v
When
you
restart
the
server
after
you
add
or
remove
a
DIMM,
the
server
displays
a
message
that
the
memory
configuration
has
changed.
Chapter
2.
Installing
optional
devices
13