–
7978-A2x
–
7978-EAY
–
7978-ECY
–
7978-JAx
–
7978-JBx
v
The
server
supports
up
to
two
microprocessors.
If
the
server
comes
with
one
microprocessor,
you
can
install
a
second
microprocessor.
v
Read
the
documentation
that
comes
with
the
microprocessor,
so
that
you
can
determine
whether
you
have
to
update
the
BIOS
code.
To
download
the
latest
level
of
BIOS
code
and
other
code
updates
for
your
server,
complete
the
following
steps:
1.
Go
to
http://www.ibm.com/systems/support/.
2.
Under
Product
support
,
click
System
x
.
3.
Under
Popular
links
,
click
Software
and
device
drivers
.
4.
Click
IBM
System
x3550
to
display
the
matrix
of
downloadable
files
for
the
server.
v
When
you
install
an
additional
microprocessor,
you
must
also
install
one
additional
cooling
fan.
See
for
fan
installation
information.
v
To
order
an
additional
optional
microprocessor,
contact
your
IBM
marketing
representative
or
authorized
reseller.
v
If
you
have
to
replace
a
microprocessor,
call
for
service.
v
The
microprocessor
speeds
are
automatically
set
for
this
server;
therefore,
you
do
not
have
to
set
any
microprocessor
frequency-selection
jumpers
or
switches.
v
If
the
thermal-grease
protective
cover
(for
example,
a
plastic
cap
or
tape
liner)
is
removed
from
the
heat
sink,
do
not
touch
the
thermal
grease
on
the
bottom
of
the
heat
sink
or
set
down
the
heat
sink.
For
details,
see
the
information
about
thermal
grease
in
the
Problem
and
Determination
Service
Guide
.
Note:
Removing
the
heat
sink
from
the
microprocessor
destroys
the
even
distribution
of
the
thermal
grease
and
requires
replacing
the
thermal
grease.
Attention:
v
A
startup
(boot)
microprocessor
must
always
be
installed
in
microprocessor
socket
1
on
the
system
board.
v
To
ensure
correct
server
operation
when
you
install
an
additional
microprocessor,
use
microprocessors
that
have
the
same
cache
size
and
type,
and
the
same
clock
speed.
Microprocessor
internal
and
external
clock
frequencies
must
be
identical.
v
Do
not
remove
the
first
microprocessor
from
the
system
board
to
install
the
second
microprocessor.
The
following
illustrations
show
how
to
install
the
second
microprocessor
on
the
system
board.
If
you
install
a
second
microprocessor
in
the
server,
you
must
install
one
additional
fan.
Note:
For
simplicity,
certain
components
are
not
shown
in
this
illustration.
To
install
an
additional
microprocessor,
complete
the
following
steps:
40
IBM
System
x3550
Type
7978:
User’s
Guide
Summary of Contents for 3550 Type 7978
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