Pentium 805D has an interesting surprise

[Thomas Charron]

On 4/25/07, Bob King <bob.king.1138 at gmail.com> wrote:
> During the Xen discussion at MerriLUG, it was mentioned that the Xen
> implementation on FC6 required PAE on the cpu. I knew that my two Linux
> boxen at home did not support VT<X>, so I checked the processors for the PAE
> flag.
>
> My Xeon system had PAE and also supported hyperthreading, which was hardly a
> surprise.
>
> However, when I checked my Pentium D 805 system, it showed PAE and HT as
> well. I new the 805 was a dual-core, but was surprised to see the HT flag. I
> cannot find anything on Intel's websites that talk about HT support, nor
> does the bios for that systems motherboard support it for me to be able to
> test it. My initial attempts at googling for info have been inconclusive.
> Most references to the cpu flags are discussing other flags, not the 'ht'
> flag which is shown but not explicitly discussed.
>
> I was wondering if anyone had heard anything about this? If the cpu really
> supports hyperthreading then I might want to invest in a new mobo for that
> box.

  The differences between Dualcore and Hyperthreading are debatable.
Is it possible that whatever reported the HT bit simply did so because
the capabilities from a software perspective are so simular?

  Now a dualcore hyperthreading processor is both of them combined,
leading to 4 logical processors.  Is that what you where hoping it
meant?  :-)

-- 
-- Thomas