and  external  clock  frequencies  must  be  identical.  You  can  use  the 
Configuration/Setup  Utility  program  to  determine  the  specific  type  of 
microprocessor  that  is  installed  on  the  system  board. 
v  Read  the  documentation  that  comes  with  the  microprocessor  to  determine 
whether  you  must  update  the  basic  input/output  system  (BIOS)  code  in  the 
server.  To  download  the  most  current  level  of  BIOS  code  for  the  server, 
seehttp://www.ibm.com/support/. 
v  Obtain  an  SMP-capable  operating  system.  For  a  list  of  supported  operating 
systems,  see  http://www.ibm.com/servers/eserver/serverproven/compat/us/. 
v  You  can  use  the  Configuration/Setup  Utility  program  to  determine  the  specific 
type  of  microprocessor  in  the  server.
To
  install  a  microprocessor,  complete  the  following  steps: 
 
1.  Read  the  safety  information  that  begins  on  page  v  and  “Installation  guidelines” 
on  page  21. 
 
2.  Turn  off  the  server  and  peripheral  devices;  then,  disconnect  the  power  cords 
and  all  external  cables.  Remove  the  cover. 
 
Attention:  The  microprocessor  retention  latch  is  spring-loaded  when  the 
microprocessor  is  in  place.  Releasing  the  latch  too  quickly  or  allowing  it  to 
spring  upward  can  damage  the  microprocessor  and  surrounding  components. 
 
3.  Remove  the  microprocessor  air  duct  from  the  fan  cage: 
a.  Grasp  the  two  pinch  points  on  the  top  of  the  air  duct  and  squeeze  them 
together. 
b.  Lift  the  air  duct  up  and  out  of  the  server  and  set  it  aside.
  4.  Release  the  microprocessor  retention  latch  by  pressing  down  on  the  end, 
moving  it  to  the  side,  and  slowly  releasing  it  to  the  open  (up)  position. 
Microprocessor
release lever
(fully open)
Microprocessor
bracket frame
 
 
 
5.  Open  the  microprocessor  bracket  frame  by  lifting  up  the  tab  on  the  top  edge. 
 
Attention:  Use  the  vacuum  tool  that  comes  with  the  replacement  part  to 
install  or  remove  the  microprocessor.  Dropping  the  microprocessor  during 
removal  or  installation  can  damage  the  contacts.  Also,  contaminants  on  the 
microprocessor  contacts,  such  as  oil  from  your  skin,  can  cause  connection 
failures  between  the  contacts  and  the  socket. 
 
6.  Install  the  microprocessor  by  using  the  vacuum  tool  and  completing  the 
following  steps. 
 
40  IBM  System  x3500  Type  7977:  User’s  Guide