https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587256#M43355 When used one at a time each cpu works with HT.<BR />2.40Ghz 533mhz fsb cpu's.<BR />I have now found that if I look under Task Manager/Performance/CPU usage history the OS will see 4 cpu's therefore HT is running on both processors. I think that the problem may be OS, win2003server SP1, related. Thu, 21 Jul 2005 10:26:34 GMT Chris Holmes_3 2005-07-21T10:26:34Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587254#M43353 I have a DL140-G1 with 2 cpu's with HT enabled I am only seeing 3 processor's ( only 1 is hyperthreading ) I have swapped them around, tried replacements and even swapped the system board but can only ever see 3.<BR />Does anyone have any idea what might be going on.<BR />Unfotunately SmartStart is not supported so I can only go on what the OS is telling me (2003Server) Wed, 20 Jul 2005 17:31:29 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587254#M43353 Chris Holmes_3 2005-07-20T17:31:29Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587255#M43354 When single used, either one can you see HT ? <BR />Both CPU market HT ? part number ? <BR /> Thu, 21 Jul 2005 07:11:35 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587255#M43354 Oleg Koroz 2005-07-21T07:11:35Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587256#M43355 When used one at a time each cpu works with HT.<BR />2.40Ghz 533mhz fsb cpu's.<BR />I have now found that if I look under Task Manager/Performance/CPU usage history the OS will see 4 cpu's therefore HT is running on both processors. I think that the problem may be OS, win2003server SP1, related. Thu, 21 Jul 2005 10:26:34 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/dl140-hyperthreading/m-p/3587256#M43355 Chris Holmes_3 2005-07-21T10:26:34Z