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A Look Inside Oak Ridge Lab's Supercomputing Facility
1sockchuck writes "Three of the world's most powerful supercomputers live in adjacent aisles within a single data center at Oak Ridge National Laboratory in Tennessee. Inside this facility, technicians are busy installing new GPUs into the Jaguar supercomputer, the final step in its transformation into a more powerful system that will be known as Titan. The Oak Ridge team expects the GPU-accelerated machine to reach 20 petaflops, which should make it the fastest supercomputer in the Top 500. Data Center Knowledge has a story and photos looking at this unique facility, which also houses the Kraken machine from the University of Tennessee and NOAA's Gaea supercomputer."
The Top 500 is a specific list: http://top500.org/
It's more correct to say it's the fastest on the list, than the fastest in the world. There are any number of metrics you can use to compare supercomputers. Top 500 just uses the most popular metric. Another machine could easily be the fastest on a different list, like http://www.graph500.org/.