IBM 84885BU User Manual - Page 45

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v The DIMM options that are available for the server are 256 MB, 512 MB, 1 GB, and 2 GB memory modules. The server supports a minimum of 256 MB and a maximum of 8 MB (when using 2 GB double-rank DIMMs) of system memory. Important: Although the server supports a maximum of 8 GB of system memory, some Microsoft® Windows® operating systems recognize and support only a lesser amount of system memory, as shown in the following table. Windows operating system Windows Server 2003, Web Edition Windows Server 2003, Standard Edition Maximum memory supported 2 GB 4 GB v The memory controller in the server provides Chipkill™ memory protection if the DIMMs are 1 GB or larger, or if the server is populated with 512 MB x4 DIMMs. Chipkill memory protection is a technology that protects the server from a single chip failure on a DIMM. v The amount of usable memory is 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. Complete the following steps to install a DIMM: 1. Read Appendix B, "Safety information," on page 143, and the "Installation guidelines" on page 25. 2. Turn off the server and peripheral devices, and disconnect the power cords and all external cables. 3. Remove the side cover (see "Removing the side cover" on page 28). 4. Remove the support bracket (see "Removing and installing the support bracket" on page 32). 5. Open the microprocessor air baffle (see "Opening and closing the microprocessor air baffle" on page 33). 6. Locate the DIMM connectors on the system board (see "System board option connectors" on page 85). Determine the connectors into which you will install the DIMMs. Chapter 4. Customer replacement units 35

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v
The
DIMM
options
that
are
available
for
the
server
are
256
MB,
512
MB,
1
GB,
and
2
GB
memory
modules.
The
server
supports
a
minimum
of
256
MB
and
a
maximum
of
8
MB
(when
using
2
GB
double-rank
DIMMs)
of
system
memory.
Important:
Although
the
server
supports
a
maximum
of
8
GB
of
system
memory,
some
Microsoft
®
Windows
®
operating
systems
recognize
and
support
only
a
lesser
amount
of
system
memory,
as
shown
in
the
following
table.
Windows
operating
system
Maximum
memory
supported
Windows
Server
2003,
Web
Edition
2
GB
Windows
Server
2003,
Standard
Edition
4
GB
v
The
memory
controller
in
the
server
provides
Chipkill
™
memory
protection
if
the
DIMMs
are
1
GB
or
larger,
or
if
the
server
is
populated
with
512
MB
x4
DIMMs.
Chipkill
memory
protection
is
a
technology
that
protects
the
server
from
a
single
chip
failure
on
a
DIMM.
v
The
amount
of
usable
memory
is
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.
Complete
the
following
steps
to
install
a
DIMM:
1.
Read
Appendix
B,
“Safety
information,”
on
page
143,
and
the
“Installation
guidelines”
on
page
25.
2.
Turn
off
the
server
and
peripheral
devices,
and
disconnect
the
power
cords
and
all
external
cables.
3.
Remove
the
side
cover
(see
“Removing
the
side
cover”
on
page
28).
4.
Remove
the
support
bracket
(see
“Removing
and
installing
the
support
bracket”
on
page
32).
5.
Open
the
microprocessor
air
baffle
(see
“Opening
and
closing
the
microprocessor
air
baffle”
on
page
33).
6.
Locate
the
DIMM
connectors
on
the
system
board
(see
“System
board
option
connectors”
on
page
85).
Determine
the
connectors
into
which
you
will
install
the
DIMMs.
Chapter
4.
Customer
replacement
units
35