Installing
memory
modules
Adding
memory
to
your
server
is
an
easy
way
to
make
programs
run
faster.
You
can
increase
the
amount
of
memory
in
your
server
by
installing
memory-module
options.
When
you
install
memory,
you
must
install
a
pair
of
matched
dual
inline
memory
modules
(DIMMs).
Notes:
1.
The
system
board
contains
6
DIMM
connectors
and
supports
two-way
memory
interleaving.
2.
The
DIMM
options
available
for
your
server
are
128
MB,
256
MB,
512
MB,
and
1
GB.
Your
server
supports
a
minimum
of
256
MB
and
a
maximum
of
6
GB
of
system
memory.
3.
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
will
display
the
total
amount
of
installed
memory
and
the
amount
of
configured
memory.
4.
When
you
install
additional
DIMMs,
be
sure
to
install
them
in
pairs.
Both
of
the
DIMMs
in
a
single
pair
must
be
the
same
size,
speed,
type
and
technology.
You
can
mix
compatible
DIMMs
from
various
manufacturers.
5.
Each
DIMM
pair
does
not
have
to
contain
DIMMs
of
the
same
size,
speed,
type,
and
technology
as
the
first
pair.
6.
Install
only
133
MHz/266
MHz,
2.5
V,
184-pin,
double-data-rate
(DDR),
PC2100,
registered
synchronous
dynamic
random-access
memory
(SDRAM)
with
error
correcting
code
(ECC)
DIMMs.
These
DIMMs
must
be
compatible
with
the
latest
PC2100
SDRAM
Registered
DIMM
specification.
For
a
list
of
supported
options
for
your
server,
go
to
http://www.ibm.com/us/compat/
on
the
World
Wide
Web.
7.
Your
server
supports
Chipkill
memory
if
the
DIMMs
are
all
type
x4
and
are
larger
than
128
MB.
Using
any
128
MB
DIMMs,
or
DIMMs
that
are
not
type
x4,
on
your
server
disables
Chipkill
memory.
8.
You
do
not
need
to
save
new
configuration
information
when
installing
or
removing
DIMMs.
The
only
exception
is
if
you
replace
a
faulty
DIMM
that
was
marked
as
Disabled
in
the
Memory
Settings
menu.
In
this
case,
you
need
to
re-enable
that
memory
row
in
the
Configuration/Setup
Utility
or
reload
the
default
memory
settings
(see
“Choices
available
from
the
Configuration/Setup
main
menu”
on
page
16).
Install
the
DIMMs
in
the
order
shown
in
the
following
table.
Table
7.
DIMM
installation
sequence
Pair
DIMM
connectors
Diagnostic
reference
First
6
and
5
(J15,
J14)
Bank
3
Second
4
and
3
(J12,
J11)
Bank
2
Third
2
and
1
(J9,
J7)
Bank
1
The
following
illustration
shows
the
DIMM
connector
locations
and
how
to
install
DIMMs
on
the
system
board.
80
xSeries
235
Type
8671:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide
Summary of Contents for 8671 - Eserver xSeries 235
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