Pentium 4 640 3.2 acting like a dual core

Hi.
When opening the task manager window, under the "performance tab", the
"Cpu Usage History" displays two colomns, as if I had a split core? why
is this?

Running WinXP (32 bit) professional sp2 on a Pentium 4 640 3.2Mhz cpu
(with 64bit support)

georgbe@gmail.com wrote:
> Hi.
> When opening the task manager window, under the "performance tab", the
> "Cpu Usage History" displays two colomns, as if I had a split core? why
> is this?
>
> Running WinXP (32 bit) professional sp2 on a Pentium 4 640 3.2Mhz cpu
> (with 64bit support)
>

640 has Hyperthreading, which is two virtual processors running
within one physical processor. Not as effective as two real cores,
but suitable for making the desktop run smoother.

http://processorfinder.intel.com/det...px?sSpec=SL7Z8

http://en.wikipedia.org/wiki/Hyperthreading

Paul

Thanks! that sums it up!
Paul skrev:
> georgbe@gmail.com wrote:
> > Hi.
> > When opening the task manager window, under the "performance tab", the
> > "Cpu Usage History" displays two colomns, as if I had a split core? why
> > is this?
> >
> > Running WinXP (32 bit) professional sp2 on a Pentium 4 640 3.2Mhz cpu
> > (with 64bit support)
> >
>
> 640 has Hyperthreading, which is two virtual processors running
> within one physical processor. Not as effective as two real cores,
> but suitable for making the desktop run smoother.
>
> http://processorfinder.intel.com/det...px?sSpec=SL7Z8
>
> http://en.wikipedia.org/wiki/Hyperthreading
>
> Paul