Scroggs
Might me a long shot, but there has just been some news about an Athlon bug.e.g.
<a href="http://www.theregister.co.uk/content/3/23749.html" target="_blank">http://www.theregister.co.uk/content/3/23749.html</a>
<a href="http://linuxtoday.com/news_story.php3?ltsn=2002-01-21-001-20-NW-KN" target="_blank">http://linuxtoday.com/news_story.php3?ltsn=2002-01-21-001-20-NW-KN</a>
Symptoms involve random lockups when using AGP - sound familiar?
[quote]. .Here are the details. As you may know, x86 systems have traditionally managed memory using 4K pages. However, with the introduction of the Pentium processor, Intel added a new feature called extended paging, which allows 4Mb pages to be used instead.
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Many Athlon and Duron CPUs experience memory corruption when extended paging is used in conjunction with AGP. . .<hr></blockquote>
It is mainly reported as affecting Linux users, but that is because a Windows fix already exits - however, it is a CPU bug rather than a bug in an OS.
From The Register:. . [quote]. .AMD issued a patch for Windows users in Fall 2000. .<hr></blockquote>
Are you patched?
Alternatively, if you can, try swapping in a PCI graphics card and see if that helps - the problem occurs only with AGP.
All the best...