Lenovo ThinkServer RD120 User Manual
Page 25
Table
2.
DIMM
installation
sequence
Pair
DIMM
connectors
1
1
and
4
2
7
and
10
3
2
and
5
4
8
and
11
5
3
and
6
6
9
and
12
Note:
When
only
one
pair
of
DIMMs
is
installed
in
the
server
and
the
BIOS
code
level
is
version
1.04
(GGE127A)
or
later,
you
can
improve
performance
by
installing
the
DIMMs
in
connectors
1
and
7
instead
of
1
and
4.
However,
because
the
connectors
in
the
pair
are
not
on
the
same
memory
branch
(see
the
following
illustration),
Advanced
ECC
memory
protection
is
disabled.
DIMM 1
DIMM 2
DIMM 3
DIMM 4
DIMM 5
DIMM 6
DIMM 7
DIMM 8
DIMM 9
Channel 0
Channel 1
Channel 2
DIMM 10
DIMM 11
DIMM 12
Channel 3
Branch 1
Branch 0
v
Each
DIMM
in
a
pair
must
be
the
same
size,
speed,
type,
and
technology
to
ensure
that
the
server
will
operate
correctly.
v
You
can
configure
the
server
to
use
memory
mirroring.
Memory
mirroring
stores
data
in
two
pairs
of
DIMMs
simultaneously.
If
a
failure
occurs,
the
memory
controller
switches
from
the
active
pair
to
the
mirroring
pair.
See
for
more
information
about
memory
mirroring
and
the
DIMM
installation
sequence
that
is
required.
Chapter
2.
Installing
optional
devices
11