From what I understand, above 8GB, you need to leave the OS 1GB for PAE.
Steve Jones
http://qa.sqlservercentral.com/columnists/sjones
The Best of SQL Server Central.com 2002 - http://qa.sqlservercentral.com/bestof/
Follow me on Twitter: http://www.twitter.com/way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com