From chemistry-request -x- at -x- server.ccl.net  Wed Mar 29 16:18:53 2000
Received: from carbon.chem.ucla.edu (carbon.chem.ucla.edu [128.97.35.55])
	by server.ccl.net (8.8.7/8.8.7) with ESMTP id QAA12989
	for <chemistry- at -ccl.net>; Wed, 29 Mar 2000 16:18:53 -0500
Received: from red5 (pc-ll.chem.ucla.edu [128.97.35.245])
	by carbon.chem.ucla.edu (8.9.1a/8.9.1) with ESMTP id NAA22379;
	Wed, 29 Mar 2000 13:18:51 -0800 (PST)
Message-Id: <4.2.0.58.20000329133454.00ae25f0(+ at +)mbi.ucla.edu>
X-Sender: lavelle&$at$&mbi.ucla.edu
X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.58 
Date: Wed, 29 Mar 2000 13:36:54 -0800
To: "M. Nicklaus" <mn1: at :helix.nih.gov>
From: Laurence Lavelle <lavelle /at\mbi.ucla.edu>
Subject: Re: CCL:Athlon vs Intel performance
Cc: CCL <chemistry #at# ccl.net>
In-Reply-To: <Pine.SGI.4.09.9L.10003291507290.334139-100000:~at~:helix.nih.go
 v>
References: <4.2.0.58.20000328184133.00ad79a0:~at~:mbi.ucla.edu>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed

Well that answers that. Are there any dual Athlon's expected this year ?
Thanks for all the replies.

Laurence


At 03:15 PM 03/29/2000 -0500, M. Nicklaus wrote:
>For what it's worth:
>
>We've run one single direct speed comparison (I wouldn't call it a 
>benchmark) so
>far, running the same Titan calculation on both a 600 MHz Pentium III
>(non-Coppermine) and an 800 MHz AMD K7 (Athlon) system, both running under
>Windows 98.  (The job was a single point energy calculation at the 
>LMP2/6-31G**
>level for a nucleoside analog.)
>
>Time for completion (as per program output, but in agreement with wall time):
>
>600 MHz Pentium III  -  7:05 h
>800 MHz Athlon       -  2:25 h
>
>Correcting (linearly) for the difference in clock rate, the Athlon is still
>faster (for this job!) by a factor of 2.2.
>
>Specs:
>
>600 MHz Pentium III  -  100 MHz FSB, 512 MB PC100 RAM, 27 GB ATA/66 
>7,200rpm HD
>800 MHz Athlon       -  100 MHz FSB, 256 MB PC100 RAM, 27 GB ATA/66 
>7,200rpm HD
>
>However, we've had quite a few stability problems with the Athlon system 
>so far
>(both in Titan and in general), but we think these are more likely related to
>hardware driver problems in Windows 98 than to true hardware instability. 
>All in
>all, YMMV.