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Re: Opteron vs. G5 comparisons

Subject: Re: Opteron vs. G5 comparisons
From: "Sean C. Garrick" <email@hidden>
Date: Mon, 13 Sep 2004 09:52:34 -0500
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I assume you're joking. My two comments are entirely unrelated, but the Top 500 benchmark indeed makes great performance from a large number of CPUs look easy.

The story about an Army lab buying a large number of Xserve G5s (connected via Gig-E) and being in the top 5 is the perfect example.


On Sep 13, 2004, at 9:43 AM, Jay A. Kreibich wrote:

On Mon, Sep 13, 2004 at 08:08:02AM -0500, Sean C. Garrick scratched on the wall:

I don't know anything about that but the G5/Xserve motherboard is not
designed for high-performance CPUs. The memory contention issues are
too much to feed two fast processors.

A brief aside: The Top 500 list is almost useless for comparing big
machines. You can couple 1000 processors via chicken-wire and the
measured performance would be the same.


  So what you're saying is that hooking two processors together is very
  very hard, while hooking 1000 together is very very easy.

-j

--
                     Jay A. Kreibich | Comm. Technologies, R&D
                        email@hidden | Campus IT & Edu. Svcs.
          <http://www.uiuc.edu/~jak> | University of Illinois at U/C


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