https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Hyperthreading-off/m-p/924631#M4907 <DIV>Im using an asus PC-DL deluxe mainboardwith 2 Xeon 2.66 GHz on it,running @ 3.12 GHz. After some hard power-downs (damn fuse) i had to reset my raid and so reinstall my win-xp pro.</DIV><DIV></DIV><DIV>And here is the problem:</DIV><DIV>After reinstalling the system the task-manager only shows 2 CPUs, but with hyperthreading enabled it should be 4</DIV><DIV></DIV><DIV>i tried:</DIV><DIV>switching ht off by bios, boot, shutdown switching on and boot again - no success</DIV><DIV>updating the BIOS to the latest version - nosuccess</DIV><DIV></DIV><DIV>Questions:</DIV><DIV>Is it possible that the installation of win-xp does not support ht? (maybe i used another installation disk before, i dont remember)</DIV><DIV>Is it possible that this installation of win-xp shows the 2 HT-CPUs as one?</DIV><DIV>How can i check if HT working fine but the os crap or the other way?</DIV> Fri, 26 May 2006 13:35:37 GMT vittel 2006-05-26T13:35:37Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Hyperthreading-off/m-p/924631#M4907 <DIV>Im using an asus PC-DL deluxe mainboardwith 2 Xeon 2.66 GHz on it,running @ 3.12 GHz. After some hard power-downs (damn fuse) i had to reset my raid and so reinstall my win-xp pro.</DIV><DIV></DIV><DIV>And here is the problem:</DIV><DIV>After reinstalling the system the task-manager only shows 2 CPUs, but with hyperthreading enabled it should be 4</DIV><DIV></DIV><DIV>i tried:</DIV><DIV>switching ht off by bios, boot, shutdown switching on and boot again - no success</DIV><DIV>updating the BIOS to the latest version - nosuccess</DIV><DIV></DIV><DIV>Questions:</DIV><DIV>Is it possible that the installation of win-xp does not support ht? (maybe i used another installation disk before, i dont remember)</DIV><DIV>Is it possible that this installation of win-xp shows the 2 HT-CPUs as one?</DIV><DIV>How can i check if HT working fine but the os crap or the other way?</DIV> Fri, 26 May 2006 13:35:37 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Hyperthreading-off/m-p/924631#M4907 vittel 2006-05-26T13:35:37Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Hyperthreading-off/m-p/924632#M4908 <DIV></DIV><P>Did you install the service packs? (Microsofts)</P><P>Did you install ASUS motherboard specific drivers?</P><P>You might be missing something to detect and turn on the 2nd processor chipset (2nd and 3rd logical processors).</P><P>Jim Dempsey</P><P></P> Sat, 27 May 2006 01:04:31 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Hyperthreading-off/m-p/924632#M4908 jimdempseyatthecove 2006-05-27T01:04:31Z