There are also a few dual cores with hyperthreading, Xeon was one product line I noticed had such models.
Logically, the HT tech would add some performance at the expense of some added hardware logic, dual cores adds more performance but takes more silicon, dual cores with HT take the most silicon and give the most performance. Empirically the relative increase in performance and resource costs seems to favor dual core, just from observing the current product lineups. It's not clear if that might change as new technologies evolve. -Brucem ---- Original message ---- >Date: Wed, 25 Apr 2007 11:08:04 -0400 >From: "Thomas Charron" <[EMAIL PROTECTED]> >Subject: Re: Pentium 805D has an interesting surprise >To: "Bob King" <[EMAIL PROTECTED]> >Cc: Greater NH Linux User Group <gnhlug-discuss@mail.gnhlug.org> > >On 4/25/07, Thomas Charron <[EMAIL PROTECTED]> 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 >_______________________________________________ >gnhlug-discuss mailing list >gnhlug-discuss@mail.gnhlug.org >http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ _______________________________________________ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
