ͻ
                                                                         
              MATCHED MEMORY COMPUTER COMPATIBILITY: HP                  
                                                                         
ͼ

   HP VECTRA 386/25

      The following information pertains to models 1, 80, and 170 of the
      Hewlett Packard 386/25 computer.

      The SIMM connectors on the system board are lettered A-D, with A on
      the right.  The Hewlett Packard manual states that only 2MB and 8MB
      SIMMS work.

      This system comes standard with 2MB of memory in one of the four
      sockets on the system's processor board.  The processor board is
      expandable to 32MB.

            Intel Matched Memory Compatibility:
            Module     Intel Part    HP Equivalent
             Size        Number       Part Number
             2MB       PCSM 1270        D2381A
             8MB       PCSM 18V4        D2152A

      ͸
      System       Recommended Memory Upgrade Path      Alternate
      Memory ĴUpgrade  
      Desired Socket A  Socket B  Socket C  Socket D Path?    
      Ĵ
        2 MB      *                                           
      Ĵ
        3 MB                Not an Option                        
      Ĵ
        4 MB      *    PCSM 1270                              
      Ĵ    
        5 MB                Not an Option                        
      Ĵ
        6 MB      *    PCSM 1270 PCSM 1270                    
      Ĵ
        8 MB      *    PCSM 1270 PCSM 1270 PCSM 1270          
      Ĵ
       10 MB PCSM 18V4     *                                  
      Ĵ
       12 MB PCSM 18V4     *     PCSM 1270                    
      Ĵ
       14 MB PCSM 18V4     *     PCSM 1270 PCSM 1270          
      Ĵ
       16 MB PCSM 18V4 PCSM 18V4                              
      Ĵ
       18 MB PCSM 18V4 PCSM 18V4     *                        
      Ĵ
       20 MB PCSM 18V4 PCSM 18V4     *     PCSM 1270          
      Ĵ
       24 MB PCSM 18V4 PCSM 18V4 PCSM 18V4                    
      Ĵ
       26 MB PCSM 18V4 PCSM 18V4 PCSM 18V4     *              
      Ĵ
       32 MB PCSM 18V4 PCSM 18V4 PCSM 18V4 PCSM 18V4          
      ;
      * Use the standard 2MB module that came with this system or PCSM
      1270.

   HP VECTRA 486/25 AND 486/33

      SIMM Sockets:  8
      Standard Memory:  2MB (2 1MB SIMMS)
      Maximum System Board Memory:  64MB
      Intel Matched Memory Compatibility:     PCSM 1170 (1MB)
                                              PCSM 1455 (4MB)
                                              PCSM 18V4 (8MB)

      This system is a large floor-standing unit.  All SIMM connectors are
      located on a special expansion board which has a large 360-pin (6x60)
      connector.  This connector makes it very difficult to remove and
      replace this board.

      The system manual states compatibility with 1MB, 4MB, and 8MB SIMMS.
      You must add memory in very specific slots depending on the SIMM
      size. 8MB SIMMs cannot be mixed with 1MB or 4MB SIMMs.

      Valid configurations for adding 1MB and 4MB SIMMs to the HP 486/33
      are:

          ͸
          Put these         In these         For this total 
          Modules            Slots           memory amount  
          Ĵ
          Two 1MB Modules   1,2              2 Megabytes    
          Ĵ
          Four 1MB Modules  1,2,3,4          4 Megabytes    
          Ĵ
          Six 1MB Modules   1,2,3,4,5,6      6 Megabytes    
          Ĵ
          Eight 1MB Modules 1,2,3,4,5,6,7,8  8 Megabytes    
          or two 4MB Modules1,2                             
          Ĵ
          Two 4MB Modules   1,2              10 Megabytes   
          & two 1MB Modules 3,4                             
          Ĵ
          Two 4MB Modules   1,2              12 Megabytes   
          & four 1MB Modules3,4,5,6                         
          Ĵ
          Two 4MB Modules   1,2              14 Megabytes   
          & six 1MB Modules 3,4,5,6,7,8                     
          Ĵ
          Four 4MB Modules  1,2,3,4          16 Megabytes   
          Ĵ
          Four 4MB Modules  1,2,3,4          18 Megabytes   
          & two 1MB Modules 5,6                             
          Ĵ
          Four 4MB Modules  1,2,3,4          20 Megabytes   
          & Four 1MB Modules5,6,7,8                         
          Ĵ
          Six 4MB Modules   1,2,3,4,5,6      24 Megabytes   
          Ĵ
          Six 4MB Modules   1,2,3,4,5,6      26 Megabytes   
          & two 1MB Modules 7,8                             
          Ĵ
          Eight 4MB Modules 1,2,3,4,5,6,7,8  32 Megabytes   
          ;

   HP VECTRA 486/25T, 33T

      The following information pertains to the:

          Hewlett Packard 486/25T models 1, 170, 440, and 670
          Hewlett Packard 486/33T models 1, 170, 440, and 1000

      These systems come standard with 4MB on the system board (two 2MB
      modules in two of the system board sockets). These system boards are
      expandable to 64MB using Intel 72-pin memory modules.

      Intel Matched Memory Compatibility:
            Module     Intel Part       HP Equivalent
             Size        Number          Part Number
             1MB       PCSM 1170           D2150A
             2MB       PCSM 1270           D2381A
             8MB       PCSM 18V4           D2152A

      ͸
      System      Recommended Memory Upgrade Path                  
      MemoryĴ
      WantedSocketSocketSocketSocketSocketSocketSocketSocket
               1     2     3     4     5     6     7     8  
      Ĵ
        4MB    *     *                                      
      Ĵ
        8MB              PCSM  PCSM                         
               *     *   1270  1270                         
      Ĵ
       12MB              PCSM  PCSM  PCSM  PCSM             
               *     *   1270  1270  1270  1270             
      Ĵ
       16MB              PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
               *     *   1270  1270  1270  1270  1270  1270 
      Ĵ
       20MB              PCSM  PCSM                         
               *     *   18V4  18V4                         
      Ĵ
       24MB              PCSM  PCSM  PCSM  PCSM             
               *     *   18V4  18V4  1270  1270             
      Ĵ
       28MB              PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
               *     *   18V4  18V4  1270  1270  1270  1270 
      Ĵ
       36MB              PCSM  PCSM  PCSM  PCSM             
               *     *   18V4  18V4  18V4  18V4             
      Ĵ
       40MB              PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
               *     *   18V4  18V4  18V4  18V4  1270  1270 
      Ĵ
       52MB              PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
               *     *   18V4  18V4  18V4  18V4  18V4  18V4 
      Ĵ
       64MB  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
             18V4  18V4  18V4  18V4  18V4  18V4  18V4  18V4 
      
      Configuration Notes:
       *  Use one of the original 2MB modules supplied with the system or
          PCSM 1270.

   HP VECTRA 486S/20 PC

      The following information pertains to the Hewlett Packard 486s/20 PC
      models 1, 120, 430, and 120 Turbo

      These systems come standard with 4MB on the system board (two 2MB
      modules in two of the system board sockets). These system boards are
      expandable to 64MB using Intel 72-pin memory modules.

      Intel Matched Memory Compatibility:
            Module     Intel Part       HP Equivalent
             Size        Number          Part Number
             1MB       PCSM 1170           D2150A
             2MB       PCSM 1270           D2381A
             4MB       PCSM 1455           D2156A
             8MB       PCSM 18V4           D2152A

      ͸
      System      Recommended Memory Upgrade Path                  
      MemoryĴ
      WantedSocketSocketSocketSocketSocketSocketSocketSocket
               1     2     3     4     5     6     7     8  
      Ĵ
        4MB    *     *                                      
      Ĵ
        6MB              PCSM  PCSM                         
               *     *   1170  1170                         
      Ĵ
        8MB              PCSM  PCSM                         
               *     *   1270  1270                         
      Ĵ
       10MB              PCSM  PCSM  PCSM  PCSM             
               *     *   1270  1270  1170  1170             
      Ĵ
       12MB              PCSM  PCSM                         
               *     *   1455  1455                         
      Ĵ
       16MB              PCSM  PCSM  PCSM  PCSM             
               *     *   1455  1455  1270  1270             
      Ĵ
       20MB              PCSM  PCSM                         
               *     *   18V4  18V4                         
      Ĵ
       24MB              PCSM  PCSM  PCSM  PCSM             
               *     *   18V4  18V4  1270  1270             
      Ĵ
       32MB  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM             
             1455  1455  18V4  18V4  1455  1455             
      Ĵ
       36MB              PCSM  PCSM  PCSM  PCSM             
               *     *   18V4  18V4  18V4  18V4             
      Ĵ
       40MB              PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
               *     *   18V4  18V4  18V4  18V4  1270  1270 

      Ĵ
       48MB  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM             
             18V4  18V4  18V4  18V4  18V4  18V4             
      Ĵ
       64MB  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM  PCSM 
             18V4  18V4  18V4  18V4  18V4  18V4  18V4  18V4 
      
      Configuration Notes:
       *  Use one of the original 2MB modules supplied with the system or
          PCSM 1270.



End of file                 Intel FaxBack # 1824          September 25,1992
