lerum 49 Posted December 29, 2004 Share Posted December 29, 2004 This would only happen in windows! One CPU *magically* turns into two overnight! Quote Link to post Share on other sites
kryppe 0 Posted December 29, 2004 Share Posted December 29, 2004 lol, its probably the skin / theme that you are using for XP that has screwed up Quote Link to post Share on other sites
hijinks 40 Posted December 29, 2004 Share Posted December 29, 2004 do you have a hyperthreading cpu? Quote Link to post Share on other sites
lerum 49 Posted December 29, 2004 Author Share Posted December 29, 2004 i do have hyperthreading, i'm also overclocking @3.6Ghz the processor is the new LGA775 socket and originally it was 3Ghz Quote Link to post Share on other sites
anyweb 490 Posted December 29, 2004 Share Posted December 29, 2004 hyperthreading=two cpu's as far as windows and linux are concerned try disabling hyperthreading in the bios and reboot, boom only one cpu appears cheers anyweb Quote Link to post Share on other sites
lerum 49 Posted December 29, 2004 Author Share Posted December 29, 2004 so does it run double the speed or is it windows trying to make out that it is better that it really is? Quote Link to post Share on other sites
anyweb 490 Posted December 29, 2004 Share Posted December 29, 2004 windows is correctly reporting that there are 'two' cpu's http://www.pcworld.com/news/article/0,aid,107492,00.asp linux does the EXACT same thing (install a modern distro on that box and you'll get the SMP kernel by default, smp= Symmetric Multiprocessing ) if you want to know if it runs at double the speed of 'one' cpu then do a benchmark, or better yet, google for Hyperthreading Performance this is not a windows issue at all, cheers anyweb Hyperthreading in Windows Hyperthreading in Linux Quote Link to post Share on other sites
lerum 49 Posted December 29, 2004 Author Share Posted December 29, 2004 i'll try most of them! Quote Link to post Share on other sites
hijinks 40 Posted December 29, 2004 Share Posted December 29, 2004 its not gonna run at twice the speed. using linux in our weather models we get around a 30% performance gain with HT on using the 2.6 kernel. So it is some gain but not twice. Basically HT allows the CPU to do two commands per clock cycle so it seems it as two cpu's Quote Link to post Share on other sites
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