I have just completed unrestricted MP2/6-31G* energy procedure (after DFT/M05-2X) for a 98-atoms (first row) molecule in 19 hours with four-node amd64 Debian amd64 etch, NWChem suite. I understand (if I understand correctly) from your email that should I have had Core 2 I would not have had the time to take a coffee in between launching the MP2 procedure and getting the computational results. Interesting.
Thanks francesco pietra > --- Jo Shields <[EMAIL PROTECTED]> wrote: > > > Subject: Re: Opinion question (Core2 Duo) > > From: Jo Shields <[EMAIL PROTECTED]> > > To: debian-amd64 <[email protected]> > > Date: Tue, 18 Sep 2007 15:51:34 +0100 > > > > > > On Tue, 2007-09-18 at 10:41 -0400, Lennart Sorensen wrote: > > > On Tue, Sep 18, 2007 at 03:08:48PM +0100, Jo Shields wrote: > > > > Or more? Buy an Altix! ;) > > > > > > Ehm, well the Altix uses either the itanium (why would anyone want that > > > crap) or a dual socket core 2 based cpu. That hardly matches a 4 or > > > more cpu opteron server. > > > > Let's assume I have large examples of both IA64 and AMD64. Plus further > > benchmark data we collected ourselves. > > > > IA64 is fast, for floating point code. On paper, it offers the same > > per-core-per-Hz FLOP count as Core (twice that of AMD64). And in > > practise, Altix scales, whilst the competition, well, doesn't. In our > > benchmarks, IA64 was not only faster per-GHz than POWER5 or AMD64, but > > faster in absolute terms too, with an 8-way test absolutely dominated by > > a 1.6-GHz-Montecito-based Altix, whilst AMD64 didn't even register a > > pulse. > > > > However, for IA64, compiler choice is key - using GCC to compile test > > code isn't just crippling the system, it's throwing away hundreds of > > thousands (if not more) of investment > > > > > SGI has nothing of any real interest. No wonder they went under not > > > that long ago. :) > > > > They've got SMP machines that don't choke at >4 cores. For some > > applications, that's of great interest. > > > > -- > > ______________________________ > > / Jo Shields <[EMAIL PROTECTED]> \ > > | Systems Manager, | > > \ Oxford Supercomputing Centre / > > ------------------------------- > > \ ,__, > > \ (oo)___ > > (__) )\ > > ||--|| * > > > > > > -- > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > > > > > > > > > ____________________________________________________________________________________ > Check out the hottest 2008 models today at Yahoo! Autos. > http://autos.yahoo.com/new_cars.html > ____________________________________________________________________________________ Don't let your dream ride pass you by. Make it a reality with Yahoo! Autos. http://autos.yahoo.com/index.html -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
