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Turn off HT via Win 7?

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a b $ Windows 7
September 12, 2010 1:44:41 AM

Hello folks,

I was just wondering, is there any way to turn off HT with in Windows 7? I have a Acer Aspire 5740-5513 and the BIOS has no options for turning of HT. However, I CAN turn off one of the Cores using msconfig. However, I still have 1C/2T according to CPUZ. Is there a way to just turn off HT and have just 2 cores active with NO HT? The reason is that I get about 40 minutes more battery life with just using a single core + HT. Theoretically, having 2C no HT should give me about 20 more minutes (compared to 2C/4T).

Basic specs:
I3 330M (2C/4T)
4GB DDR3
Samsung MP4 500GB (7200 rpm)
Intel IGP (Grr…..)

Thanks


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a c 215 $ Windows 7
September 12, 2010 2:01:08 AM
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The msconfig utility should allow you limit the number of cores visible to Windows down to 1. My i7 920 based desktop can do it, anywhere from 1 to 8 via msconfig, as can my i7 720QM based laptop.

There is no way to disable hyper threading through Windows, like you can through the BIOS. If the BIOS does not have the option to turn it off, msconfig would seem to be the only option.
a b $ Windows 7
September 12, 2010 2:14:45 AM

Quote:

There is no way to disable hyper threading through Windows, like you can through the BIOS. If the BIOS does not have the option to turn it off, msconfig would seem to be the only option.

Yeah, I was afraid of that.

And yeah, I can set anywhere from 1-4 cores, however, I'd like to have 2 actual cores instead of 1C + HT = 2T. Seems like there isn't a way to do that....
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a b $ Windows 7
September 12, 2010 2:14:49 AM

Best answer selected by Shadow703793.
a c 215 $ Windows 7
September 12, 2010 2:19:15 AM

Unfortunately I don't know how msconfig handles which cores get disabled (if 1 and 2 are physical and 3 and 4 are the hyper threaded, logical cores, or whether the physical are 1 and 3, and the logical are 2 and 4), and there's no way to specify.
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