JSI Tip 2283. Mismatched CPU Stepping levels.

Jerold Schulman

April 16, 2000

1 Min Read
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In Windows NT 4.0, multi-processor support required that the Stepping levels on your processors be matched.

Windows 2000 will run with mismatched Stepping levels, though you may experience erratic behavior.

If Windows 2000 detects mismatched CPU Stepping, you receive a System Event log entry similar to:

   -------------------------------------------------------------------------   Event ID Count Component    Message sample                                  -------------------------------------------------------------------------   I   41    32   Application  The CPUs in this multiprocessor system are                     Popup        not all the same revision level.  To use all                                processors the operating system restricts                                   itself to the features of the least capable                                 processor in the system.  Should problems                                   occur with this system, contact the CPU                                     manufacturer to see if this mix of processors                               is supported. 


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