There have been some bugs with column comparisons on 2000 that are fixed in SP4:
http://support.microsoft.com/kb/822747
http://support.microsoft.com/kb/929440
Hopefully one of these is your issue - it doesn't sound like hardware is your problem.
Paul Randal
CEO, SQLskills.com: Check out SQLskills online training!
Blog:www.SQLskills.com/blogs/paul Twitter: @PaulRandal
SQL MVP, Microsoft RD, Contributing Editor of TechNet Magazine
Author of DBCC CHECKDB/repair (and other Storage Engine) code of SQL Server 2005