Installing a memory module, Installing, Memory – Lenovo 6446 User Manual
Page 24: Module
2.
If
you
are
planning
to
install
or
remove
a
microprocessor,
memory
module,
PCI
adapter,
battery,
or
other
non-hot-swap
optional
device,
turn
off
the
server
and
all
attached
devices
and
disconnect
all
external
cables
and
power
cords
(see
Attention:
In
a
dc
power
environment,
only
trained
service
personnel
other
than
Lenovo
service
technicians
are
authorized
to
connect
or
disconnect
power
to
the
dc
power
supply.
See
the
documentation
that
comes
with
each
dc
power
supply.
3.
Press
down
on
the
left
and
right
side
latches
and
pull
the
server
out
of
the
rack
enclosure
until
both
slide
rails
lock.
Note:
You
can
reach
the
cables
on
the
back
of
the
server
when
the
server
is
in
the
locked
position.
4.
Lift
the
cover-release
latch
1
.
Lift
the
cover
off
the
server
and
set
the
cover
aside.
Attention:
For
proper
cooling
and
airflow,
replace
the
cover
before
you
turn
on
the
server.
Operating
the
server
for
extended
periods
of
time
(more
than
30
minutes)
with
the
cover
removed
might
damage
server
components.
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
installing
DIMMs:
v
The
server
supports
up
to
12
Fully
Buffered
DIMM
PC2-5300
512
MB,
1
GB,
2
GB,
and
4
GB
DIMMs,
for
a
maximum
of
48
GB
of
system
memory.
See
for
a
list
of
memory
modules
that
you
can
use
with
the
server.
Note:
Because
some
memory
is
reserved
for
system
operation,
the
actual
usable
memory
size
that
is
reported
by
the
operating
system
is
less
than
the
total
installed
size.
v
The
server
comes
with
a
minimum
of
two
512
MB
DIMMs,
installed
in
slots
1
and
4.
When
you
install
additional
DIMMs,
you
must
install
two
identical
DIMMS
at
a
time,
in
the
order
shown
in
the
following
table,
to
maintain
performance.
10
ThinkServer
RD120
Types
6444,
6445,
6446,
and
6447:
Installation
Guide