System X (Linux/OS X)
System X (pronounced "System Ten") was a 1,024 node cluster composed of Apple Xserve G5 cluster nodes, each with dual 2.3 GHz PowerPC 970FX processors, 4 GB ECC DDR400 (PC3200) RAM, an 80 GB S-ATA hard disk drive, and one Mellanox Cougar InfiniBand 4x HCA. The system was partitioned into 832 nodes running OS X and 192 nodes running Yellow Dog Linux (YHPC 1.1). It was assembled by Virginia Tech faculty members, staff, and students and once ranked as the third-fastest supercomputer in the world.
System X was decommissioned on May 21, 2012 after serving the Virginia Tech research community for nine years. System X and the SGI Altix systems ran more than 214,000 jobs combined in that span. For more information about System X's installation, see the System X History page.