I did some testing on this a while back. While others have reported some instability on Win2k with hyperthreading - I was never able to see any. There clearly is a performance variability at times, and degregadation, on that OS. See my white paper "Should you enable HyperThreading on Server 2003" (http://www.tmurgent.com/images/WP_HyperThread.pdf). Tim Mangan ________________________________ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Parr Sent: Friday, January 21, 2005 11:11 AM To: 'thin@xxxxxxxxxxxxx' Subject: [THIN] Re: Page file max out Are there Citrix Admin's out there disabling hyperthreading if running Win2k OS? Have seen recommendations that it is better to disable for Win2k but for Win2k3 hyperthreading generally will give a performance boost depending on load and type of app. Is there anyone out there who has tested\experinced Win2k OS for hyperthreading vs. disabled hyperthreading when running Citrix/TS? I just hear people saying that hyperthreading "could" lead to system stability, but perhaps there are people out there who have switched from one mode to another and seen noticeable improvements? ******************************************************** This Weeks Sponsor SeamlessPlanet.com Domain Names Register your .com domain name for as low as $7.85 One of the lowest prices on the web! Part of The Kenzig Group. http://www.seamlessplanet.com ********************************************************** Useful Thin Client Computing Links are available at: http://thin.net/links.cfm ThinWiki community - Awesome SBC Search Capabilities! http://www.thinwiki.com *********************************************************** For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thin.net/citrixlist.cfm