Microsoft KB Archive/142694

= CPU Write-Back Cache Disabled on Certain Cyrix Processors =

Article ID: 142694

Article Last Modified on 10/31/2006

-

APPLIES TO


 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition

-



This article was previously published under Q142694



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 kbhardware KB142694

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.