One such is the move towards the cluster architecture, in which a number of computers work together to form a more powerful machine. In the last ranking such machines, which include the Virginia Tech Apple Mac machine, totaled 208 and this has grown to 291 systems in the new list. That represents just under 60 percent of all machines in the Top 500.
A look at the hardware shows Intel Corp. making big gains on its competitors with a total of 287 machines are based on Intel chips, up from 119 this time last year. IBM Corp. remains the top manufacturer accounting for 45 percent of systems ahead of Hewlett-Packard Co. in second with 28 percent.
The full Top 500 ranking can be found online at http://www.top500.org . It is compiled by Hans Meuer of the University of Mannheim, Erich Strohmaier and Horst Simon of NERSC/Lawrence Berkeley National Laboratory, and Jack Dongarra of the University of Tennessee.