Installing a memory module, Installing, Memory – IBM 4190 User Manual
Page 50: Module
PCI-X slot
Power cable
8.
Connect
the
riser-card
power
cable
to
the
PCI-X
riser-card
assembly.
If
you
have
to
remove
the
PCI-X
riser-card
assembly
from
the
server,
disconnect
the
riser-card
power
cable
from
the
assembly
first;
then,
grasp
the
front
and
rear
edges
of
the
assembly
and
lift
the
assembly
out
of
the
server.
If
you
have
other
devices
to
install
or
remove,
do
so
now.
Otherwise,
go
to
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
512
MB,
1
GB,
and
2
GB
DIMMs,
for
a
maximum
of
8
GB
of
system
memory.
See
for
a
list
of
memory
modules
that
you
can
use
with
the
server.
v
The
amount
of
usable
memory
will
be
reduced
depending
on
the
system
configuration.
A
certain
amount
of
memory
must
be
reserved
for
system
resources.
Use
the
system
summary
in
the
Configuration/Setup
Utility
program
to
view
the
total
amount
of
installed
memory
and
the
amount
of
configured
memory
(see
v
The
server
comes
with
one
512
MB
or
1
GB
DIMM
installed
in
DIMM
connector
1
and
an
identical
DIMM
(the
same
size,
speed,
type,
and
technology)
installed
in
DIMM
connector
3.
v
If
you
install
a
pair
of
DIMMs
in
DIMM
connectors
2
and
4,
the
size,
speed,
type,
and
technology
of
the
DIMMs
that
you
install
in
DIMM
connectors
2
and
4
must
match
each
other.
However,
they
do
not
have
to
be
the
same
size,
speed,
type,
and
technology
as
the
DIMMs
that
are
installed
in
DIMM
connectors
1
and
3.
v
You
can
use
compatible
DIMMs
from
various
manufacturers
in
the
same
pair.
v
Install
only
double-data-rate
II
(DDR
II),
PC2-5300,
unbuffered
synchronous
dynamic
random-access
memory
(SDRAM)
with
error
correcting
code
(ECC)
DIMMs.
These
DIMMs
must
be
compatible
with
the
latest
PC2-5300
SDRAM
unbuffered
DIMM
specification.
v
If
you
install
a
pair
of
2
GB
DIMMs
and
a
pair
of
other-size
DIMMs,
the
2
GB
DIMMs
must
be
installed
as
the
first
pair
(in
DIMM
connectors
1
and
3).
36
IBM
System
x3250
M2
Types
4190
and
4194:
User’s
Guide