System G

Contact: Kirk Cameron

The System G cluster consists of 324 Mac Pros, each with two 4-core 2.8 GHz Intel Xeon processors (for a total of 2592 processor cores) and eight GB of RAM. The system was the first supercomputer running over quad data rate (QDR) InfiniBand (40Gbs) interconnect technology. System G (for "green") also has unique power-aware capabilities, with thousands of power and thermal sensors allowing researchers to design and develop algorithms and systems software that achieve high-performance with modest power requirements, and to test such systems at unprecedented scale. With a sustained (Linpack) performance of 22.8 TFlops, System G is the largest power-aware research system and one of the world's largest clusters dedicated to computer science systems research.

System X

Contact: Calvin Ribbens

URL: http://www.arc.vt.edu/arc/index.php

System X is a supercomputer assembled by Virginia Tech faculty members, staff, and students in the summer of 2003, comprising 1,100 Apple PowerMac G5 computers. System X is currently running at 12.25 Teraflops, (20.24 peak), and was last ranked #47 (November, 2006) in the TOP500 list of the world's most powerful supercomputers. At that time, it was still the most powerful system categorized by TOP500 as "self made" at any university. It is now part of Virginia Tech's suite of high performance computers being used for research.