IBM 436854u User Manual - Page 42

System, Summary

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Table 3. Dual-channel mode with single-rank and double-rank DIMMs First pair Second pair DIMM 1 DIMM 2 DIMM 3 DIMM 4 Single-rank Single-rank Single-rank Single-rank Single-rank Single-rank Double-rank Double-rank Double-rank Double-rank Single-rank Single-rank Double-rank Double-rank Double-rank Double-rank Remarks This configuration is the second-best choice. This configuration is the best choice. The following table shows the sequence in which DIMMs must be installed in the server. Table 4. DIMM installation sequence Number of DIMMs Installation sequence (connectors) 1 1 2 (interleaved configuration) 1, 3 3 4 (interleaved configuration) The use of three DIMMs is not supported, 1, 3, 2, 4 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 Chapter 3, "Configuring the server," on page 57. v When you restart the server after you add or remove a DIMM, the server displays a message that the memory configuration has changed. 28 System x3200 M2 Types 4367 and 4368: User's Guide

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Table
3.
Dual-channel
mode
with
single-rank
and
double-rank
DIMMs
First
pair
Second
pair
Remarks
DIMM
1
DIMM
2
DIMM
3
DIMM
4
Single-rank
Single-rank
Single-rank
Single-rank
Single-rank
Single-rank
Double-rank
Double-rank
This
configuration
is
the
second-best
choice.
Double-rank
Double-rank
Single-rank
Single-rank
This
configuration
is
the
best
choice.
Double-rank
Double-rank
Double-rank
Double-rank
The
following
table
shows
the
sequence
in
which
DIMMs
must
be
installed
in
the
server.
Table
4.
DIMM
installation
sequence
Number
of
DIMMs
Installation
sequence
(connectors)
1
1
2
(interleaved
configuration)
1,
3
3
The
use
of
three
DIMMs
is
not
supported,
4
(interleaved
configuration)
1,
3,
2,
4
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
Chapter
3,
“Configuring
the
server,”
on
page
57.
v
When
you
restart
the
server
after
you
add
or
remove
a
DIMM,
the
server
displays
a
message
that
the
memory
configuration
has
changed.
28
System
x3200
M2
Types
4367
and
4368:
User’s
Guide