64-bit CPU

[Frank Peng]

Anybody has played with 64-bit CPU?
How about the motherboard and other hardware?
How Windows support 64-bit and how about other
applications support 64-bit environment?

Thanks a lot!

--- Lennart Sorensen <lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org>
wrote:

> On Tue, Sep 14, 2004 at 10:06:48AM -0700, Frank Peng
> wrote:
> > I thought Windows is 32bit OS. So it should be
> using
> > 4GB memory instead of you said 3GB memory.
> 
> Windows 32bit can give you a 4GB memory space, of
> which on most OSs the
> top 1 or 2G is reserved for PCI mapping and the OS
> itself.  It can
> actually access more than 4GB using a system called
> PAE which allows up
> to 64GB.  You still only get 4GB memory space as far
> as an application
> can tell, and it still is limited by what part of
> the 4GB memory space
> the OS lets the application have.  It used to be 2GB
> application/2GB OS,
> but most have switched to 3GB/1GB to let larger
> applications run.
> basically you can run multiple applications on an
> 8GB machine with 32bit
> windows and use 2 or 3GB per application, although
> you do get a small
> performance hit when you pass 4GB since the system
> has to start using
> memory mapping to get the ram above 4GB mapped into
> the lower 4GB (it
> essentially swaps segments of memory in and out of
> the lower 4GB memory
> space on the fly).  64bit windows (em64t/x86-64
> compatible) can access
> lots of ram directly and can give each application
> (64bit applications
> that is) all the ram they want.
> 
> > If that is true, I should back off to INTEL 915P
> which
> > has PCI Express port to drive ATI FIREGL V7100.
> > 
> > I know I should live with PNY FX3000/4000/3400.
> But
> > look at the price, it kills me instantly. Should I
> > live with 128MB PNY rather than 256MB ATI. They
> claim
> > the 3D performance is 8.0GB/sec and it is
> certified
> > with OPEN GL and DirectX9.0. ATI really scares?
> 
> In general ATI has slightly better Direct3D than
> nvidia, and nvidia has
> better OpenGL than ATI.  And the price of a video
> card worries you while
> you are looing at a Xeon?  What's the Xeon for?  The
> Xeon has larger
> cache, slower ram (wby quite a bit) and costs a
> fortune.  Why would
> anyone buy that?  Even the P4EE makes more sense
> than a Xeon for most
> single cpu systems, and I don't even think that one
> makes much sense.
> Have you looked at benchmarks of different cpus for
> the applications you
> intend to run?  Is the Xeon good at that
> application?  Well i suppose
> the PNY cards can be a bit expensive, although I
> thought some of the
> lower end cards weren't that bad.
> 
> I hope PCIe becomes mature and available soon,
> because so far I am not
> convinced it is ready yet.  Not enough decent
> motherboards and chipsets
> with support for it.
> 
> > ATI is a Canadian company. I wish them make some
> > money!
> 
> Well I have bought many cards from them.  I got
> sufficiently annoyed
> when a 3 year old card could no longer get working
> drivers for Windows.
> They have had badly broken driver releases for some
> cards for even
> something as new as XP in the last few years.
> 
> Basically ATI has excelent hardware with lousy
> software support behind
> it.
> 
> Just because they are Canadian doesn't mean they can
> get away with
> providing users with junk.  It's not like Matrox is
> selling that much
> lately either (lack of open soruce specs seems to be
> hurting some too).
> 
> Lennart Sorensen
> --
> The Toronto Linux Users Group.      Meetings:
> http://tlug.ss.org
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