5
Troubleshooting and Repair
73
Memory module replacement procedures
Note:
While
the
ATCA
‐
46xx
CPM
can
operate
using
a
wide
range
of
DIMM
memory
combinations,
at
least
one
DIMM
module
should
be
installed
in
each
CPU
DIMM
bank
to
ensure
there
are
not
boot
initialization
errors.
Adding or replacing memory modules
Replacing
DIMMs
consists
of
removing
the
CPM
from
the
shelf,
removing
the
main
board
cover,
removing
any
DIMMs
to
be
replaced,
installing
the
new
DIMMs,
replacing
the
main
board
cover,
and
re
‐
installing
the
CPM
in
the
shelf.
The
following
sections
detail
these
procedures.
W
ARNING
!
Observe
appropriate
ESD
precautions
when
performing
the
procedures
in
this
chapter
(see
Electrostatic
discharge
on
page 10).
Supported DIMM combinations
The
CPM
normally
uses
registered
DIMMs
(RDIMMs)
in
full
sets
of
twelve
identical
modules.
The
supported
module
kits
are
as
follows:
•
A4600
‐
MEM
‐
48GB:
This
is
a
set
of
twelve
modules
of
4GB
DDR3
VLP
RDIMMs.
•
A4600
‐
MEM
‐
96GB:
This
is
a
set
of
twelve
modules
of
8GB
DDR3
VLP
RDIMMs.
Note:
The
CPM
can
support
memory
module
sets
of
DDR3
VLP
RDIMMs
in
capacities
of
1GB,
2GB,
4GB,
8GB,
16GB
and
32GB
per
module
as
long
as
maximum
memory
temperature
for
the
modules
is
not
exceeded.
Removing DIMMs
These
instructions
assume
the
CPM
has
been
removed
from
the
shelf
and
the
main
board
cover
has
been
removed.
1. Determine
which
DIMMs
to
remove
(see
previous
discussion
under
Supported
DIMM
combinations
).
2. Press
outward
on
the
ejector
latches
to
pop
out
a
DIMM,
as
indicated
for
the
front
DIMM
socket
in
Figure 9
.
