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Re: OT: dual-core or 64 bit?



On Tue, 2007-01-30 at 17:33 -0600, Jonathan Berry wrote:
> On 1/30/07, David Fletcher <fc fletchersweb net> wrote:
> > On Sunday 28 January 2007 22:07, Jonathan Berry wrote:
> > > On 1/28/07, Mick Mearns <off_by_1 yahoo com> wrote:
> > > > Hi list;
> > > >  this is off topic.
> > > >
> > > > I was wondering which is better a dual-core x86 cpu or an x64 cpu?
> > > > Which is actually faster/better in "normal" use?
> > > > How about installation problems and hardware cost?
> > > >
> > > > I am not planning any upgrades just yet but am curios.
> > >
> > > Why not get a dual-core x86_64 CPU?  All the AMD dual-core chips are
> > > 64-bit and Intel's Core 2 Duo is 64-bit.  Personally, I like AMD
> > > better.  There is really no reason to get a 32-bit only CPU anymore.
> > > If you don't want to run 64-bit yet, you can still run 32-bit just
> > > fine.  And a 64-bit installation gives you the choice to run both.
> > >
> > > Jonathan
> >
> > If the List doesn't mind me staying off topic (it's closer to topic than
> > servicing a Chevy pickup gearbox I think ;-) ):- Next time I build a new
> > computer I'd like to be sure that I can run a Xen kernel with full
> > virtualisation. Then when I occasionally need to poke a little finger into
> > the Dark Side I can do so without having to shut down and reboot, and keep
> > the damned thing backed up so I don't ever need to do a fresh install again.
> >
> > As I Understand It, if I go for an AMD chip I need to be sure to buy one that
> > incorporates technology called Pacifica. Only thing that's troubling me about
> > this is, I can't find any mention of Pacifica in connection with AMD chips in
> > the component shops.
> >
> > Also, I believe I can't do it on this P4 computer because it can only do what
> > is called paravirtualisation, requiring hooks to be added to the guest OS.
> > Which is probably why I could run the 98SE installation CD OK when I played
> > with it but it wouldn't boot.
> >
> > So, List, is the little bit I think I know about virtualisation correct?
> 
> Yeah, that sounds like what I have heard about the subject.
> 
> > Are there chips available now that have Pacifica (such as the AMD Opterons) or
> > are they not out yet?
> They are out.  There has not been as much talk about it for some
> reason.  I have been surprised at that.  But you want any Socket AM2
> AMD CPU (which is the newest) or I think Socket F is the other new
> socket (I think for the Opteron class CPUs ?).  Socket 939 and 940

I think socket 940 IS AM2

> CPUs do not have Pacifica support (not sure what its official name is
> now).  On the Intel side, I think all the Core series CPUs have
> whatever Intel calls its virtualization extensions.  I'm not sure if



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