I did a lot of testing with it last year. I never saw it cause an error, but things often stall due to the idle processing clearing out too much on the chip when one of the logical processor idles. It caused erratic performance. Under a heavy load it *might* cause a crash, but I never saw one. I would definitely disable HT under 2000. -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Bob Sent: Thursday, September 30, 2004 9:50 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Hyperthreading Has anybody experimented with Hyperthreading On -vs- Off on Win2k servers? I've heard rumblings that it can be problematic, and perhaps decrease performance. I noticed that most SpecInt. winners have it disabled. I'm considering disabling it on one of my farm servers to observe the results. If anybody else has experimented I'd love to hear about it. Thanks in advance, Bob ******************************************************** This Weeks Sponsor RTO Software Do you know which applications are abusing your CPU and memory? Would you like to learn? -- Free for a limited time! Get the RTO Performance Analyzer to quickly learn the applications, users, and time of day possible problems exist. http://www.rtosoft.com/enter.asp?id=320 ********************************************************** Useful Thin Client Computing Links are available at: http://thin.net/links.cfm *********************************************************** For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thin.net/citrixlist.cfm ******************************************************** This Weeks Sponsor RTO Software Do you know which applications are abusing your CPU and memory? Would you like to learn? -- Free for a limited time! Get the RTO Performance Analyzer to quickly learn the applications, users, and time of day possible problems exist. http://www.rtosoft.com/enter.asp?id=320 ********************************************************** Useful Thin Client Computing Links are available at: http://thin.net/links.cfm *********************************************************** For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thin.net/citrixlist.cfm