HOW TO TURN OFF HYPERTHREADING

[jacksmith]

Hi everyone. I'm running an intel 2.6 with hypertheading. I'm using XP
home edition 2002. I'm wanting to turn off hyperthreading. In the
device manager it lists two processors, obviously cause hyperthreading
is on. Do I just disable one of the processers, and if so, presuming
that I can, which one? Or is there another way?

 

[Patrick Keenan]

Hi everyone. I'm running an intel 2.6 with hypertheading. I'm using XP
home edition 2002. I'm wanting to turn off hyperthreading. In the
device manager it lists two processors, obviously cause hyperthreading
is on. Do I just disable one of the processers, and if so, presuming
that I can, which one? Or is there another way?

I'm not sure why you would want to disable hyperthreading, but... .

You can't disable "one of the processors" because there is only one, with
two cores.

The OS version should be irrelevant to this, the controls should be in the
BIOS advanced settings somewhere; where exactly will depend on the
motherboard and its features.

You might find a motherboard utility from the board maker that runs under XP
that allows you to access to these controls. Or you can just power down
and restart (often BIOS setup is not accessible on warm boot) and start
looking. Looking in the motherboard manual is probably a good place to
start, too.

HTH
-pk

 

[John John (MVP)]

You have to disable it in the BIOS.

John

 

[M.I.5¾]

Hi everyone. I'm running an intel 2.6 with hypertheading. I'm using XP
home edition 2002. I'm wanting to turn off hyperthreading. In the
device manager it lists two processors, obviously cause hyperthreading
is on. Do I just disable one of the processers, and if so, presuming
that I can, which one? Or is there another way?

Just to satisfy the curious: why exactly do you want to do this?

 

[Mike Cawood, HND BIT]

Hi everyone. I'm running an intel 2.6 with hypertheading. I'm using XP
home edition 2002. I'm wanting to turn off hyperthreading. In the
device manager it lists two processors, obviously cause hyperthreading
is on. Do I just disable one of the processers, and if so, presuming
that I can, which one? Or is there another way?

Two processors are listed because your CPU has two cores. I am totally at a
loss to understand what the problem is.
Regards Mike.

 

[John John (MVP)]

Two processors are listed because your CPU has two cores. I am totally at a
loss to understand what the problem is.

It doesn't have two cores if it is a simple hyper-threaded processor.

John

 

[Richard]

I read somewhere that in older programs not set up for it, it doesn't help
and might even hurt performance. Is this correct? have it turned off in my
Dell 3400 and it seems a bit faster.

 

[Ian D]

Hi everyone. I'm running an intel 2.6 with hypertheading. I'm using XP
home edition 2002. I'm wanting to turn off hyperthreading. In the
device manager it lists two processors, obviously cause hyperthreading
is on. Do I just disable one of the processers, and if so, presuming
that I can, which one? Or is there another way?

Add /numproc=1 to the end of your boot.ini boot line. You could
create a multi-boot to select HT on, or off, during boot. This can
also be used to select the number of cores active for a multicore
CPU.

 

[jacksmith]

Just to satisfy the curious: why exactly do you want to do this?

I'm recording audio on my PC for which I've got a specialised sound
card that for some reason can react to hyperthreading in a way that
causes "clicks and pops" to occur when recording a track. These
gliches are a result of miniscule recurrent dropouts.