IBM QS21 Service Guide - Page 54

Adding, memory, modules

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Adding I/O DDR2 memory modules This section describes how to add extra I/O DDR2 memory. There are two slots per Cell/B.E. companion chip allowing up to 1 GB of memory for each Cell/B.E. companion chip for I/O buffering. DIMM filler DIMM slot at JDIM11 DIMM slot at JDIM10 DIMM filler DIMM slot at JDIM01 DIMM slot at JDIM00 Figure 12. DIMM slot location You must add memory as pairs of dual inline memory modules (DIMMs). You may fit one or more memory modules for each buffer, but each I/O buffer must use the same type of memory module and have the same amount of memory. The minimum amount of memory you can add is 512 MB per buffer, or one module per buffer. If you fit a single pair of DIMMs you must use slots JDIM00 and JDIM11. The BladeCenter QS21 supports VLP DDR2 512 MB DIMMs only. Note: The DIMMs are used as memory for the I/O buffers only. You cannot increase the size of system memory which is fixed at 1GB for each Cell/B.E. processor. To install extra I/O buffer memory, complete the following steps: 1. Shut down the BladeCenter QS21. 2. Remove the BladeCenter QS21 from the BladeCenter unit. 3. Open the top cover. 4. Locate the DIMM slots in which you want to insert the I/O DDR2 memory. modules. 36 BladeCenter QS21 Type 0792: Problem Determination and Service Guide

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Adding
I/O
DDR2
memory
modules
This
section
describes
how
to
add
extra
I/O
DDR2
memory.
There
are
two
slots
per
Cell/B.E.
companion
chip
allowing
up
to
1
GB
of
memory
for
each
Cell/B.E.
companion
chip
for
I/O
buffering.
You
must
add
memory
as
pairs
of
dual
inline
memory
modules
(DIMMs).
You
may
fit
one
or
more
memory
modules
for
each
buffer,
but
each
I/O
buffer
must
use
the
same
type
of
memory
module
and
have
the
same
amount
of
memory.
The
minimum
amount
of
memory
you
can
add
is
512
MB
per
buffer,
or
one
module
per
buffer.
If
you
fit
a
single
pair
of
DIMMs
you
must
use
slots
JDIM00
and
JDIM11.
The
BladeCenter
QS21
supports
VLP
DDR2
512
MB
DIMMs
only.
Note:
The
DIMMs
are
used
as
memory
for
the
I/O
buffers
only.
You
cannot
increase
the
size
of
system
memory
which
is
fixed
at
1GB
for
each
Cell/B.E.
processor.
To
install
extra
I/O
buffer
memory,
complete
the
following
steps:
1.
Shut
down
the
BladeCenter
QS21.
2.
Remove
the
BladeCenter
QS21
from
the
BladeCenter
unit.
3.
Open
the
top
cover.
4.
Locate
the
DIMM
slots
in
which
you
want
to
insert
the
I/O
DDR2
memory.
modules.
DIMM slot at JDIM00
DIMM slot at JDIM01
DIMM slot at JDIM11
DIMM slot at JDIM10
DIMM filler
DIMM
filler
Figure
12.
DIMM
slot
location
36
BladeCenter
QS21
Type
0792:
Problem
Determination
and
Service
Guide