http://blogs.msdn.com/psssql/archive/2008/12/16/how-it-works-sql-server-no-longer-uses-rdtsc-for-timings-in-sql-2008-and-sql-2005-service-pack-3-sp3.aspxMany of you have encountered the RDTSC timing variances that I outlined in an earlier blog post:&#160;&#160; http://blogs.msdn.com/psssql/archive/2006/11/27/sql-server-2005-sp2-will-introduce-new-messages-to-the-error-log-related-to-timing-activities.aspxenCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/psssql/archive/2008/12/16/how-it-works-sql-server-no-longer-uses-rdtsc-for-timings-in-sql-2008-and-sql-2005-service-pack-3-sp3.aspx#9230543Wed, 17 Dec 2008 12:46:46 GMT91d46819-8472-40ad-a661-2c78acb4018c:9230543rusanu.com &raquo; Blog Archive &raquo; Event ID 833: I/O requests taking longer than 15 seconds<p>PingBack from <a rel="nofollow" target="_new" href="http://rusanu.com/2008/10/28/event-id-833-io-requests-taking-longer-than-15-seconds/">http://rusanu.com/2008/10/28/event-id-833-io-requests-taking-longer-than-15-seconds/</a></p> http://blogs.msdn.com/psssql/archive/2008/12/16/how-it-works-sql-server-no-longer-uses-rdtsc-for-timings-in-sql-2008-and-sql-2005-service-pack-3-sp3.aspx#9243958Sat, 20 Dec 2008 16:12:47 GMT91d46819-8472-40ad-a661-2c78acb4018c:9243958Andrew Kelly<p>The way in which SQL Server has treated Time has been a very misunderstood subject for as long as I can</p> http://blogs.msdn.com/psssql/archive/2008/12/16/how-it-works-sql-server-no-longer-uses-rdtsc-for-timings-in-sql-2008-and-sql-2005-service-pack-3-sp3.aspx#9454351Mon, 02 Mar 2009 16:43:05 GMT91d46819-8472-40ad-a661-2c78acb4018c:9454351No1 Microsoft Fan<p>What time do you have? The way in which SQL Server has treated Time has been a very misunderstood subject</p>