Are you talking about the Windows Power Plan settings? If so check these out.
http://sqlserverperformance.wordpress.com/2010/09/28/windows-power-plans-and-cpu-performance
http://www.brentozar.com/archive/2010/10/sql-server-on-powersaving-cpus-not-so-fast[/url]
http://greg.blogs.sqlsentry.net/2011/01/ensuring-maximum-cpu-performance-via.html
Jason Carter
Tampa, Florida
"Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young" - Henry Ford