IBM 8835 Hardware Maintenance Manual - Page 47

Installing, memory, modules

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Installing memory modules This section describes the types of dual inline memory modules (DIMMs) that the server supports and other information that you must consider when installing DIMMs, as well as how to install memory modules in the server. Before you install memory modules, read the following information: v The server uses interleaved DIMMs, which you must add, remove, or replace in pairs. Each pair must be of the same type, capacity, and speed. Adding memory to the server is an easy way to improve system performance. 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 through one of the following methods: - Replacing the installed DIMMs with higher-capacity DIMMs - Installing an additional pair of DIMMs in slots 3 and 4 for a single microprocessor configuration - Installing an additional pair of DIMMs in slots 5 and 6 for a dual-microprocessor configuration Note: For optimal dual-microprocessor performance, install DIMMs in slots 1, 2, 5, and 6. The server supports 512 MB and 1 GB DIMMs. See the ServerProven® list at http://www.ibm.com/pc/us/compat/ for a list of memory modules that are supported by the server. The following illustration shows the memory slots on the system board. DIMM 4 (DDR4) DIMM 3 (DDR3) DIMM 2 (DDR2) DIMM 1 (DDR1) DIMM 6 (DDR6) DIMM 5 (DDR5) Complete the following steps to install DIMMs: 1. Read "Safety information" on page 101 and "Installation guidelines" on page 25. 2. Turn off the server and all attached peripheral devices. Disconnect all power cords; then, disconnect all external signal cables from the server. Chapter 4. Installing options 37

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Installing
memory
modules
This
section
describes
the
types
of
dual
inline
memory
modules
(DIMMs)
that
the
server
supports
and
other
information
that
you
must
consider
when
installing
DIMMs,
as
well
as
how
to
install
memory
modules
in
the
server.
Before
you
install
memory
modules,
read
the
following
information:
v
The
server
uses
interleaved
DIMMs,
which
you
must
add,
remove,
or
replace
in
pairs.
Each
pair
must
be
of
the
same
type,
capacity,
and
speed.
Adding
memory
to
the
server
is
an
easy
way
to
improve
system
performance.
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
through
one
of
the
following
methods:
–
Replacing
the
installed
DIMMs
with
higher-capacity
DIMMs
–
Installing
an
additional
pair
of
DIMMs
in
slots
3
and
4
for
a
single
microprocessor
configuration
–
Installing
an
additional
pair
of
DIMMs
in
slots
5
and
6
for
a
dual-microprocessor
configuration
Note:
For
optimal
dual-microprocessor
performance,
install
DIMMs
in
slots
1,
2,
5,
and
6.
The
server
supports
512
MB
and
1
GB
DIMMs.
See
the
ServerProven
®
list
at
for
a
list
of
memory
modules
that
are
supported
by
the
server.
The
following
illustration
shows
the
memory
slots
on
the
system
board.
DIMM 4 (DDR4)
DIMM 3 (DDR3)
DIMM 2 (DDR2)
DIMM 1 (DDR1)
DIMM 6 (DDR6)
DIMM 5 (DDR5)
Complete
the
following
steps
to
install
DIMMs:
1.
Read
“Safety
information”
on
page
101
and
“Installation
guidelines”
on
page
25.
2.
Turn
off
the
server
and
all
attached
peripheral
devices.
Disconnect
all
power
cords;
then,
disconnect
all
external
signal
cables
from
the
server.
Chapter
4.
Installing
options
37