'True' vs. 'Pseudo' Quad Core

"Benjamin Gawert" <> wrote in message
news:...

<snip>

Benjamin -

Thanks for an explanation that attempts to describe some tangible benefit of
HT.

For the record, I've always enabled HT on machines that have the capability
'just in case' there is/was some less than obvious benefit.

My skepticism resides with Intel and not with the posters here though I
consider myself 'an Intel guy'.


Stew

I seem to recall that hyperthreading caused slower performance for
certain applications. Am I remembering this correctly?

Daddy

S.Lewis wrote:
> "Benjamin Gawert" <> wrote in message
> news:...
>
> <snip>
>
> Benjamin -
>
> Thanks for an explanation that attempts to describe some tangible benefit of
> HT.
>
> For the record, I've always enabled HT on machines that have the capability
> 'just in case' there is/was some less than obvious benefit.
>
> My skepticism resides with Intel and not with the posters here though I
> consider myself 'an Intel guy'.
>
>
> Stew
>
>

* Daddy:
> I seem to recall that hyperthreading caused slower performance for
> certain applications. Am I remembering this correctly?

Yes. For single threaded apps where only one app is running HT causes a
very slight performance decrease due to the overhead and how it
distributes CPU ressources. But this was hardly noticeable with the
first HT CPUs (P4 XEON 1.7GHz), and is probably even less noticeable
today, especially since more and more apps are to at least some degree
multithreaded.

Benjamin