Pentium 805D has an interesting surprise

[Thomas Charron]

On 4/25/07, Thomas Charron <twaffle at gmail.com> wrote:
> > 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?

  After rereading, I anted to clarify.  Dualcore is better then
Hyperthreading.  A HT processor actually shows as two logical
processors, when there are actually only one that's capable of quickly
switching between two things, looking from the outside like it's
actually doing two at once.

  A Dual-core processor has two real physical cores.  A hyperthreaded
processor can only do two things at the same time IN CERTAIN CASES.
In other cases, even though it looks like 2, it's simply switching
tasks and one core, doing twice as much work, but then taking twice as
long to do it, negating the performance gain.  It really all depends
on what the processor is doing.  Two threads making heavy use of
floating point math = might as well just call it normal non
hyperthreaded.  Two applications doing simple stuff, it can do then
basically at the same time on one core, making it look like it was
actually two cores doing the work.

-- 
-- Thomas