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'''System G''' is a cluster supercomputer at Virginia Tech consisting of 324 Apple Inc.|Apple Mac Pro computers with a total of 2592 processing cores. It was finished in November 2008 and ranked 279 in that month's edition of TOP500, running at 16.78 Flops|teraflops and peaking at 22.94 teraflops. It now runs at a "sustained (Linpack) performance of 22.8 TFlops". [http://www.checs.eng.vt.edu/resources.php] It transmits data between nodes over Gigabit Ethernet and 40Gb/s Infiniband.

==Mac Pro Nodes==
Each of the 324 Mac Pro machines contains two quad-core 2.8&nbsp;GHz Xeon processors and 8 gigabytes (GB) of ram.

==Namesake==
System G's name stems from its homage to System X and to its focus on Green Computing. The cluster has thousands of power and thermal sensors to test high performance computing at low power requirements. It is the largest power-aware research system in the world. [http://www.checs.eng.vt.edu/resources.php]

==Reservations==
[[SystemG_Reservations]]

==Important Info==
[[SystemG_Info]]

==External links==
* [http://www.vtnews.vt.edu/story.php?relyear=2008&itemno=745 Virginia Tech press release on System G]
* [http://arstechnica.com/apple/news/2008/07/virginia-tech-building-supercomputer-out-of-324-mac-pros.ars Ars Technica: Virginia Tech building super computer out of 324 Mac Pros]
* [http://www.top500.org/ TOP500 website]
* [http://www.checs.eng.vt.edu/ Virginia Tech CHECS website]