Last Revised
AST RESEARCH, INC.       INFORMATIONAL BULLETIN # 0019       10/14/97 
 
 
 
TITLE:  Second CPU Compatibility Manhattan P/V
 
 
SUMMARY 
 
   Several different versions or "steppings" of Pentium CPUs are 
   available. Manhattan P and V servers must use the proper 
   combination of these CPUs in order to function properly.
   
   Some symptoms of dual processor incompatibility are:  When 
   installing a second CPU in a Manhattan P/V system, the customer 
   may experience a problem booting or the second processor will not 
   be recognized by an operating system such as Windows NT server 
   3.51.
   
   This issue affects the following systems: 501500, 501501, 501502, 
   501503, and 501830.    
 
 
NOTES 
 
   Several different versions or "steppings" of Pentium CPUs are 
   available.  Manhattan P and V servers must use the proper 
   combination of these CPUs in order to function properly.
   
   Some symptoms of dual processor incompatibility are:  When 
   installing a second CPU in a Manhattan P/V system, the customer 
   may experience a problem booting or the second processor will not 
   be recognized by an operating system such as Windows NT server 
   3.51.
   
   The processor board MUST be a current revision to ensure proper 
   support for dual processors.  Refer to TB# 1354 for a list of 
   part numbers and revision levels for the processor boards.    
   
   This issue affects the following systems: 501500, 501501, 501502, 
   501503, and 501830. 
   
   There are two ways to determine a processor's "stepping":
   
   1. On the CPU chip itself (top and bottom sides).
   
   2. A software utility that reads Intel proprietary
      information stored in the CPU.
   
   Please use the following table to determine which CPU IC to use 
   in each socket of a 202619 CPU board (60/90, 66/100, or 66/133).  
   These are the ONLY acceptable combinations.  If a combination is 
   not listed here, do NOT use it.  
   
   PCBA part number 202619, built for 100MHz or 133 MHz CPUs (e.g. 
   202619-113), should NOT be downgraded in speed to use the B1 or 
   B3 CPU steppings.  If they are, the boards will work with a 
   single CPU but will not work correctly with dual CPUs.
   
              Primary CPU      Secondary CPU
   Freq       Marking/Step     Marking/Step
   
   90MHz      SX879/B1         SX874/B1
   90MHz      SX879/B1         SX942/B3
   90MHz      SX879/B1         SX957/B5
   90MHz      SX879/B1         SX968/C2
   
   90MHz      SX923/B3         SX874/B1
   90MHz      SX923/B3         SX942/B3
   90MHz      SX923/B3         SX957/B5
   90MHz      SX923/B3         SX968/C2
   
   90MHz      SX957/B5         SX874/B1
   90MHz      SX957/B5         SX942/B3 
   90MHz      SX957/B5         SX957/B5
   90MHz      SX957/B5         SX968/C2
   
   90MHz      SX968/C2         SX874/B1
   90MHz      SX968/C2         SX942/B3 
   90MHz      SX968/C2         SX957/B5
   90MHz      SX968/C2         SX968/C2
   
   100MHz     SX963/C2         SX963/C2
   
   133MHz     SK106/cB1        SK106/cB1
   133MHz     SK106/cB1        SK107/cB1
   133MHz     SK107/cB1        SK106/cB1
   133MHz     SK107/cB1        SK107/cB1
   
   The following additions do not use the <A HREF="FTP://FTP.AST.COM/S-OTHER/P5ID.EXE">P5ID.EXE</A> file to view the 
   stepping.  You must look at the processor chip to identify the 
   stepping.
   
   133MHz     SK106/SSS        SY022/SSS
   133MHz     SY022/SSS        SY022/SSS
   
   For additional information on dual processor configurations, see 
   Technical Bulletin # 1286.
   
   Contact AST's Technical Support at (800) 727-1278 to verify that 
   the processor board in your system is at the correct revision 
   level to support dual processors.
   
   File <A HREF="FTP://FTP.AST.COM/S-OTHER/P5ID.EXE">P5ID.EXE</A> identifies the primary CPU's stepping.  This file 
   is available from any of AST's On-Line! services as follows:
      
         AST WWW Site:  http://www.ast.com
         AST On-Line! BBS*:  See IB0001.TXT
         CompuServe:  GO: ASTFORUM
         Prodigy:   JUMP: ASTSUPPORT
      
         * Refer to IB0001.TXT for a list of AST's 
           international BBS numbers.
    
   To decompress this file, create a temporary directory on your 
   hard drive, copy the downloaded file to that directory, and run 
   the file.    
 
 
TAN 002120DZ, 001241EM 
 
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