IBM x3655 User Guide - Page 70

Configuration/Setup - memory configuration

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v If you install two microprocessors in the server, at a minimum, you must install two DIMMs in slots 1 and 2 and two DIMMs in slot 9 and 10. v The server supports online-spare memory. This feature disables a failed pair of DIMMS from the system configuration and activates an online-spare pair of DIMMs to replace the failed pair. Online-sparing is supported on a per processor basis. Each microprocessor requires that two or more pairs of DIMMs be installed to support online sparing. The DIMMs must be the same speed, type, size (or larger), and technology as the failed pair of DIMMs. Enable online-spare memory through the Configuration/Setup Utility program. The BIOS code assigns the online-spare memory DIMM pairs according to your DIMM configuration. v When you install or remove DIMMs, the server configuration information changes. When you restart the server, the system displays a message indicating that the memory configuration has changed. To install a DIMM, complete the following steps. To install a DIMM, complete the following steps: 1. Read the safety information that begins on page v and "Installation guidelines" on page 23. 2. Turn off the server and peripheral devices, and disconnect the power cord and all external cables. Remove the cover (see "Removing the cover" on page 26). Attention: To avoid breaking the retaining clips or damaging the DIMM connectors, open and close the clips gently. 3. Remove the riser-card assembly (see "Removing the riser-card assembly" on page 26). 4. Remove the air baffle (see "Removing the air baffle" on page 29). 5. Open the retaining clip on each end of the DIMM connector. 6. Touch the static-protective package that contains the DIMM to any unpainted metal surface on the server. Then, remove the DIMM from the package. 7. Turn the DIMM so that the DIMM key aligns correctly with the connector. 8. Insert the DIMM into the connector by aligning the edges of the DIMM with the slots at the ends of the DIMM connector. Firmly press the DIMM straight down into the connector by applying pressure on both ends of the DIMM simultaneously. The retaining clips snap into the locked position when the DIMM is firmly seated in the connector. 56 System x3655 Type 7985: User's Guide

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v
If
you
install
two
microprocessors
in
the
server,
at
a
minimum,
you
must
install
two
DIMMs
in
slots
1
and
2
and
two
DIMMs
in
slot
9
and
10.
v
The
server
supports
online-spare
memory.
This
feature
disables
a
failed
pair
of
DIMMS
from
the
system
configuration
and
activates
an
online-spare
pair
of
DIMMs
to
replace
the
failed
pair.
Online-sparing
is
supported
on
a
per
processor
basis.
Each
microprocessor
requires
that
two
or
more
pairs
of
DIMMs
be
installed
to
support
online
sparing.
The
DIMMs
must
be
the
same
speed,
type,
size
(or
larger),
and
technology
as
the
failed
pair
of
DIMMs.
Enable
online-spare
memory
through
the
Configuration/Setup
Utility
program.
The
BIOS
code
assigns
the
online-spare
memory
DIMM
pairs
according
to
your
DIMM
configuration.
v
When
you
install
or
remove
DIMMs,
the
server
configuration
information
changes.
When
you
restart
the
server,
the
system
displays
a
message
indicating
that
the
memory
configuration
has
changed.
To
install
a
DIMM,
complete
the
following
steps.
To
install
a
DIMM,
complete
the
following
steps:
1.
Read
the
safety
information
that
begins
on
page
v
and
“Installation
guidelines”
on
page
23.
2.
Turn
off
the
server
and
peripheral
devices,
and
disconnect
the
power
cord
and
all
external
cables.
Remove
the
cover
(see
“Removing
the
cover”
on
page
26).
Attention:
To
avoid
breaking
the
retaining
clips
or
damaging
the
DIMM
connectors,
open
and
close
the
clips
gently.
3.
Remove
the
riser-card
assembly
(see
“Removing
the
riser-card
assembly”
on
page
26).
4.
Remove
the
air
baffle
(see
“Removing
the
air
baffle”
on
page
29).
5.
Open
the
retaining
clip
on
each
end
of
the
DIMM
connector.
6.
Touch
the
static-protective
package
that
contains
the
DIMM
to
any
unpainted
metal
surface
on
the
server.
Then,
remove
the
DIMM
from
the
package.
7.
Turn
the
DIMM
so
that
the
DIMM
key
aligns
correctly
with
the
connector.
8.
Insert
the
DIMM
into
the
connector
by
aligning
the
edges
of
the
DIMM
with
the
slots
at
the
ends
of
the
DIMM
connector.
Firmly
press
the
DIMM
straight
down
into
the
connector
by
applying
pressure
on
both
ends
of
the
DIMM
simultaneously.
The
retaining
clips
snap
into
the
locked
position
when
the
DIMM
is
firmly
seated
in
the
connector.
56
System
x3655
Type
7985:
User’s
Guide