Last Revised
AST RESEARCH, INC.        TECHNICAL BULLETIN # 1765          10/07/97 
 
 
 
TITLE:  Manhattan and Dual Processors
 
 
ISSUE 
 
   Due to the limited availability of the Intel Pentium 90Mhz 
   processors, Manhattan P & V 5090 customers may be unable to 
   upgrade their systems to a dual processor configuration.
   
   This issue affects the following systems: 501500 and 501502.    

 
BACKGROUND 
 
   N/A    

 
ACTION 
 
   Upgrade the secondary processor to an  Intel Pentium 100Mhz 
   processor (CPU marking sx963, stepping C2).    

 
NOTES 
 
   The Manhattan 5090 P & V processor boards are hard-wired to the 
   proper external frequency required by a Pentium 90Mhz processor. 
   Using a Pentium processor of greater speed will provide a 
   functional dual processor configuration running at the Pentium 90 
   specification. AST does not support modifying the processor board 
   to a faster processor speed.
   
   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.  Refer 
   to IB # 0019 for a list of CPU stepping configurations.  
      
   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 a Windows NT server  
   3.51.
      
   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.
   
   For additional information on dual processor configurations, see 
   Technical Bulletin #s 1286.    

 
TAN PRJ 2400MW 
 
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