are intel core 2 duo amd64?

[MJang]

On Sat, 2006-11-25 at 14:04 +0100, Thomas Kaiser wrote:
> Magnus Runesson wrote:
> > On Sat, 2006-11-25 at 13:14 +0100, Mihamina Rakotomandimby wrote:
> >> Hi,
> >> What Ubuntu iso have I got to download if my computer is an Intel Core 2
> >> Duo? 
> >>
> > 
> > It depends on the CPU-number. i386 always works. You may use the 64-bit
> > (AMD64) if your CPU supports EM64T (which is Intels terminology for
> > AMD-64.) It can unfortunately be hard to find the information at intels
> > site.
> > 
> > The following support EM64T: T7200, T7400, T7600, T5500, T5600
> > It may be that all Core 2 Duo supports EM64T, but I am not sure.
> 
> I do have a T7200 and I didn't know that this is a 64 Bit CPU. So, I 
> just run a 64 Bit Ubuntu live CD (AMD64 5.04) which I have and it booted 
> without problems.
> 
I have the same CPU, and currently run 32-bit Kubuntu. Now here's a
stupid question - what's the advantage of using the 64-bit version? 

Does anyone here know which is better for Xen in hardware virtualization
mode? (I'm currently testing HVM on the same system on RHEL 5 beta 2 and
SLES 10.)

Thanks,
Mike