CPU Write-Back Cache Disabled on Certain Cyrix Processors

 Last reviewed: March 26, 1997
Article ID: Q142694
The information in this article applies to:
  • Microsoft Windows NT Server version 4.0
  • Microsoft Windows NT Workstation version 4.0

SUMMARY

When initializing certain Cyrix processors, Windows NT 4.0 will disable the CPU write-back cache to prevent serious system problems.

MORE INFORMATION

Certain Cyrix processors are known to cause serious problems with Windows NT 4.0.

If Windows NT detects certain Cyrix processor steppings, it will disable the L1 w/b (write-back) cache.

This will reduce performance but will guard against systemwide problems caused by the write-back cache, thus preventing data-loss.

The Cyrix products discussed here are manufactured by Cyrix Corporation, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: prodnt cyrix write-back processor
Keywords : kb3rdparty kbhw NTSrvWkst
Version : 4.0
Platform : WinNT

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: March 26, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.