From chemistry-request@server.ccl.net Thu Aug 12 06:45:30 1999 Received: from neon.chem.ucla.edu (neon.chem.ucla.edu [128.97.35.251]) by server.ccl.net (8.8.7/8.8.7) with ESMTP id GAA23603 for ; Thu, 12 Aug 1999 06:45:29 -0400 Received: from localhost (mdb@localhost) by neon.chem.ucla.edu (8.8.0/8.8.0) with SMTP id DAA17319; Thu, 12 Aug 1999 03:48:27 -0700 (PDT) X-Authentication-Warning: neon.chem.ucla.edu: mdb owned process doing -bs Date: Thu, 12 Aug 1999 03:48:27 -0700 (PDT) From: "Michael D. Bartberger" To: Szieberth Denes cc: Gary Kedziora , chemistry@ccl.net Subject: Re: CCL:Xeon processors In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Dear Dino and Gary: Thanks for posting this; these are very valuable numbers to know, especially with the high price of the Xeon processors. Now, this only leaves me to wonder if anyone has been able to get hold of one of an AMD Athlon-based system for some testing.... it would appear that AMD has at last surpassed Intel, at least for now, in raw FPU performance. Some computing magazines and web sites have recieved test boxes and the results are surprising, to say the least! With best regards, -Michael Bartberger UCLA On Thu, 12 Aug 1999, Szieberth Denes wrote: > > > > Has anyone seen a comparison of the performance of a Xeon processor > > with a straight Pentium II or III at the same (or nearly the same) > > clock speed? I'm interested in performance comparisons using > > the usual chemistry applications, good cache-optimized code-- > > not implying there is no good cache-optimized chemistry code--or > > any other benchmark. > > > Hi, > I was testing a normal pII450 against a pII450 xeon with 1024 kb cache. > The application was Gaussian94 compiled with the f2c-gcc combination, the > tests jobs were geom. optimizations and freq. calculations on 10-atom > molecules with 70-250 basis functions and the results were disappointing: > the xeon was only about 5 % faster, despite the bigger and faster cache. > > dino > dino@iris.inc.bme.hu > > > > -= This is automatically added to each message by mailing script =- > CHEMISTRY@ccl.net -- To Everybody | CHEMISTRY-REQUEST@ccl.net -- To Admins > MAILSERV@ccl.net -- HELP CHEMISTRY or HELP SEARCH > CHEMISTRY-SEARCH@ccl.net -- archive search | Gopher: gopher.ccl.net 70 > Ftp: ftp.ccl.net | WWW: http://www.ccl.net/chemistry/ | Jan: jkl@ccl.net > > > > > >