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Does anyone know how, or if it's even possible, to disable Hyper-Threading on an Dell XPS L502x?

I've checked the BIOS, which seems like it's hiding a lot of the usual options, but can't see anything.

I've tried disabling Intel SpeedStep, which did nothing.

Thanks
Kieron

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Why disable it? –  VenkatH Sep 11 '12 at 13:42
    
Because the nature of the apps I run means I'd rather have them run with 25% of the available CPU than 12% (they're primarily single threaded for a lot of the operations). –  Kieron Sep 11 '12 at 14:16

3 Answers 3

up vote 1 down vote accepted

You can do that via a mod-ed BIOS, see this thread.

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It depends on your OS.

On FreeBSD sysctl machdep.hyperthreading_allowed=0 will disable it.

According to these similar posts on superuser it might be a bit harder on windows 7.

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