Installing a memory module, Installing, Memory – Lenovo 6434 User Manual
Page 40: Module
Installing
a
memory
module
The
following
notes
describe
the
types
of
dual
inline
memory
modules
(DIMMs)
that
the
server
supports
and
other
information
that
you
must
consider
when
you
install
DIMMs:
v
The
server
supports
only
industry-standard,
1.8
V,
240-pin
double-data-rate
2
(DDR2),
800
MHz,
PC2-5300
or
PC2-6400,
unbuffered,
synchronous
dynamic
random-access
memory
(SDRAM)
dual
inline
memory
modules
(DIMMs)
with
error
correcting
code
(ECC).
These
DIMMs
must
be
compatible
with
the
latest
DDR2
or
800
MHz
SDRAM
unbuffered
DIMM
specification.
For
a
list
of
supported
optional
devices
for
the
server,
go
to:
v
The
optional
DIMMs
that
are
available
for
the
server
are
1
GB
and
2
GB.
The
server
supports
a
minimum
of
1
GB
and
a
maximum
of
8
GB
of
system
memory.
v
Some
servers
come
with
two
1-
GB
DIMMs
installed.
Depending
on
the
DIMM
sizes
that
are
installed
in
your
server,
the
server
can
support
two
or
four
DIMMs.
The
1-
GB
DIMM
and
2-GB
DIMM
option
kits
each
contain
two
DIMMs.
v
The
system
board
contains
four
DIMM
connectors
and
supports
two-way
memory
interleaving.
For
two-way
memory
interleaving,
DIMMs
must
be
installed
in
matched
pairs.
If
one
DIMM
is
installed
in
the
DIMM
1
connector,
when
you
install
an
additional
DIMM,
it
must
be
installed
in
the
DIMM
3
connector,
and
it
must
be
the
same
size,
speed,
type,
and
technology
as
the
DIMM
in
the
DIMM
1
connector.
You
can
use
compatible
DIMMs
from
various
manufacturers.
If
you
install
a
second
pair
of
DIMMs
in
the
DIMM
2
and
DIMM
4
connectors,
they
do
not
have
to
be
the
same
size,
speed,
type,
and
technology
as
the
DIMMs
in
the
DIMM
1
and
DIMM
3
connectors.
However,
the
size,
speed,
type,
and
technology
of
the
DIMMs
that
you
install
in
the
DIMM
2
and
DIMM
4
connectors
must
match
each
other.
v
The
maximum
operating
speed
of
the
server
is
determined
by
the
slowest
DIMM
in
the
server.
v
The
server
can
operate
in
single-channel
mode
or
dual-channel
mode.
v
DIMM
population
is
based
on
single-rank,
double-rank,
or
combined
single-rank
and
double-rank
DIMMs.
DIMMs
must
be
installed
in
order,
starting
with
the
DIMM
connector
that
is
farthest
from
the
memory
controller
hub.
Double-rank
DIMMs
must
be
installed
in
the
DIMM
connector
that
is
farthest
from
the
memory
controller
hub
when
you
install
a
combination
of
single-rank
and
double-rank
DIMMs.
The
following
tables
show
examples
of
populating
the
server
with
different
combinations
of
single-rank
and
double-rank
DIMMs
and
different
operating
modes.
Table
3.
Single-channel
mode
with
single-rank
and
double-rank
DIMMs
Channel
0
Channel
1
DIMM
1
DIMM
2
DIMM
3
DIMM
4
Single-rank
Double-rank
Single-rank
Single-rank
26
ThinkServer
TS100
Types
6431,
6432,
6433,
and
6434:
User
Guide