From owner-chemistry #at# ccl.net Tue Mar 28 16:53:01 2006
From: "Ross Walker ross%rosswalker.co.uk" <owner-chemistry]_[server.ccl.net>
To: CCL
Subject: CCL:G: Comparison of Athelon and Pentium 4M ?
Message-Id: <-31346-060328163314-5936-XWXgvD4UZrdoGA5ohIEz0g]_[server.ccl.net>
X-Original-From: "Ross Walker" <ross]^[rosswalker.co.uk>
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Date: Tue, 28 Mar 2006 13:33:06 -0800
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Sent to CCL by: "Ross Walker" [ross++rosswalker.co.uk]

> I have to compare some performance numbers between a couple 
> of processors.
> Specifically, the Athelon MP 1800+   and a 2.4 GHz Pentium 4M laptop.
> 
> I'm only interested in rough comparisons (e.g. "P4M is  ~1.5x 
> faster on 
> the XXX benchmark than Athelon", etc.)
> 
> I've poked around the web and have not found any good resources for 
> these numbers.

Adding the normal Caveat that performance is always a function of the type
of job you want to run...:

There are some Gaussian 98 numbers I ran a long time ago on various
processors including an Athlon 1800XP which should be the same as an Athlon
1800MP (they only differ in the fact that one of the external bridges is
lasered open on the XP version to stop it working parallel. If you close the
bridge with some conductive paint it then reports itself as an 1800MP...) -
see
http://www.rosswalker.co.uk/benchmarks/gaussian_98_a7_proc_comparissons.html

There aren't any 2.4GHz P4 M numbers on there unfortunately but the Gaussian
input is there if you have access to such a machine running Gaussian you
could get the numbers.

> From just general experience I think you should be looking at a considerable
speed difference for the P4M - of the order of 2x or more. The 2 MB cache of
the P4M makes a big big difference. Plus the FSB speed is better.

I hope this helps,

All the best
Ross

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|\oss Walker

| HPC Consultant and Staff Scientist |
| San Diego Supercomputer Center |
| Tel: +1 858 822 0854 | EMail:- ross%a%rosswalker.co.uk |
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