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+--- Thread: Can someone tell me?!?! (/thread-2964.html)
Can someone tell me?!?! - lerum - 2004-12-29
This would only happen in windows!
One CPU *magically* turns into two overnight! o_O
<a class="ipsAttachLink ipsAttachLink_image" href="<fileStore.core_Attachment>/post-12-1104330439.gif" data-fileid="244">[img]<fileStore.core_Attachment>/post-12-1104330439.gif[/img]</a>
Can someone tell me?!?! - kryppe - 2004-12-29
lol, its probably the skin / theme that you are using for XP that has screwed up ;)
Can someone tell me?!?! - hijinks - 2004-12-29
do you have a hyperthreading cpu?
Can someone tell me?!?! - lerum - 2004-12-29
i do have hyperthreading, i'm also overclocking @3.6Ghz
the processor is the new LGA775 socket and originally it was 3Ghz
Can someone tell me?!?! - anyweb - 2004-12-29
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
Can someone tell me?!?! - lerum - 2004-12-29
so does it run double the speed [img]<___base_url___>/uploads/emoticons/default_rolleyes.gif[/img] or is it windows trying to make out that it is better that it really is? [img]<___base_url___>/uploads/emoticons/default_ph34r.png[/img]
Can someone tell me?!?! - anyweb - 2004-12-29
windows is correctly reporting that there are 'two' cpu's
[/url][url=http://www.pcworld.com/news/article/0,aid,107492,00.asp]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
Can someone tell me?!?! - lerum - 2004-12-29
i'll try most of them!
Can someone tell me?!?! - hijinks - 2004-12-29
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