During the unveiling of the, SGI touted a speed of 42.7 trillion calculations per second, or 42.7 teraflops. That handily beat the machine at the top of a list of the world's , at 35.9 teraflops, as well as a top challenger, at 36.0 teraflops.
The 42.7 teraflops speed used only 16 of Columbia's 20 servers. That means that 2,048 of the 10,240 Itanium processors in the supercomputer weren't being used--and the unused chips are the newest generation of Itaniums, each with 9MB of high-speed cache memory, SGI Chief Executive Bob Bishop said.
SGI clocked the full 20-server system at a sustained speed of 51.9 teraflops, according to a source familiar with the test. On a secondary but still scrutinized measurement, peak speed, Columbia ran at 61.0 teraflops, a smidgen ahead of theIntel President Paul Otellini predicted in September.
Full results in the closely watched competition are released every June and November at supercomputing conferences; the newest Top500 list will be released Nov. 8, organizer Jack Dongarra said. Despite the interest in the list, its organizers and others recognize that the speed test, called Linpack, is a .
SGI's higher speed gives the Mountain View, Calif., company more of a lead over IBM, but Big Blue's score was performed Sept. 16, leaving plenty of time for upgrades and new speed tests.
SGI declined to confirm or deny the statistics, and Dongarra declined to comment.