[gmx-users] Re: itanium2 vs xeon

Michel Cuendet michel.cuendet at epfl.ch
Wed Feb 25 11:01:01 CET 2004


  I don't know about xeons, but I have compared Itanium2 1GHz and 
opteron 1.4GHz. Itanium is 40% slower. It's really hard to reach the 
theoretical power of an itanium without highly optimized code. For a 
definite answer we should wait for the assembly loops, though.

  If I were you, I would definitely go for either xeon or opteron, and 
buy a fast switch with it. This would still amount to about half the 
price of as many itanium2 cpu's, and save you a lot of headaches in 
installing software...



>Message: 7
>Date: Tue, 24 Feb 2004 20:51:47 +0530
>From: Y U Sasidhar <sasidhar at chem.iitb.ac.in>
>To: "gmx-users at gromacs.org" <gmx-users at gromacs.org>
>Subject: [gmx-users] itanium2 vs xeon
>Reply-To: gmx-users at gromacs.org
>We are looking at purchase options involving itanium2(dual) and 
>xeon(dual) servers. Itanium2 is 4 times costlier than xeon machine ! In 
>this context I have the following querys.
>1. Are assembly loops implemented on itanium2 ?
>2.  What is the OS used ? Mandrake Linux (64 bit )? What other Linux 
>versions available ?
>3. How does itanium2 1 GHz, compare to Xeon at 2.8 GHz for GROMACS
> -- Sasidhar

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