Installing  an  additional  microprocessor 
The  following  notes  describe  the  type  of  microprocessor  that  the  server  supports 
and  other  information  that  you  must  consider  when  installing  a  microprocessor: 
v  The  server  supports  certain  Intel  Xeon  dual-core  or  quad-core  flip-chip  land  grid 
array  771  (FC-LGA  771)  microprocessors,  which  are  designed  for  the  LGA771 
socket.  See  http://www.ibm.com/servers/eserver/serverproven/compat/us/  for  a 
list  of  supported  microprocessors. 
Important:  Dual-core  and  quad-core  microprocessors  are  not  interchangeable 
and  cannot  be  used  in  the  same  server.  For  example,  if  the  server  has  a 
dual-core  microprocessor,  you  cannot  install  a  quad-core  microprocessor  as  the 
second  microprocessor.  Use  the  Configuration/Setup  Utility  program  to  determine 
the  type  and  speed  of  the  microprocessor  that  is  currently  installed  in  the  server. 
v  The  server  supports  up  to  two  microprocessors.  If  the  server  comes  with  one 
microprocessor,  you  can  install  a  second  microprocessor. 
v  Both  microprocessors  must  have  the  same  cache  size  and  type,  front-side  bus 
frequency,  and  the  same  clock  speed.  Microprocessor  internal  and  external  clock 
frequencies  must  be  identical. 
v  When  you  install  an  additional  microprocessor  in  microprocessor  connector  2, 
you  must  also  install  the  voltage  regulator  module  (VRM),  which  comes  with  the 
microprocessor,  in  the  VRM  connector. 
v  Read  the  documentation  that  comes  with  the  microprocessor  to  determine 
whether  you  must  update  the  basic  input/output  system  (BIOS)  code  for  the 
server.  To   download  the  most  current  level  of  BIOS  code  and  many  other  code 
updates  for  your  server,  go  to  http://www.ibm.com/systems/support/,  select 
System  x3650  from  the  Hardware  list,  and  click  the  Download  tab. 
v  (Optional)  Obtain  an  SMP-capable  operating  system.  For  a  list  of  supported 
operating  systems  and  optional  devices,  go  to  http://www.ibm.com/servers/
eserver/serverproven/compat/us/.
 
v  To  order  additional  microprocessors,  contact  your  IBM  marketing  representative 
or  authorized  reseller. 
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  you  have  to  replace  a  microprocessor,  call  for  service. 
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. 
v  Do  not  remove  the  first  microprocessor  from  the  system  board  to  install  the 
second  microprocessor. 
The  following  illustration  shows  the  microprocessor  connector  locations  and  other 
microprocessor-related  components  on  the  system  board.
 
20  IBM  System  x3650  Type  7979:  Installation  Guide