#1: Tianhe-2, National University of Defense Technology in China
The followup to Tianhe-1A, the new world’s #1 broke the speed record with performance of 33.86 petaflops. Tianhe-2 uses Ivy Bridge-based Intel Xeons and Intel Xeon Phi for a total of 3.12 million cores. The computer uses 17,808 kilowatts of power and can theoretically hit speeds of up to 54.9 petaflops.
#2: Titan, Oak Ridge National Laboratory
Titan was #1 last November with a speed of 17.6 petaflops. The system uses AMD-based Cray CPUs and Nvidia GPUs in its 560,640 cores. Rated the third most energy efficient supercomputer last November, Titan uses 8,209 kilowatts of power.
#3: Sequoia, Lawrence Livermore National Laboratory
The world’s #1 supercomputer in June 2012, Sequoia is used by the National Nuclear Security Administration to conduct simulations aimed at extending the lifespan of nuclear weapons. The Blue Gene/Q system has nearly 1.6 million cores and hits speeds of 17.2 petaflops.
#4: K computer, RIKEN Advanced Institute for Computational Science in Japan
Ranked #1 in the world in 2011, the K computer was made by Fujitsu. Delivering 10.5 petaflops with 705,024 Sparc cores, the K computer uses a six-dimensional torus interconnect called Tofu.
#5: Mira, Department of Energy’s Argonne National Laboratory
This Blue Gene/Q system uses 786,432 cores to hit 8.6 petaflops. When it hits full production in 2014 Mira will offer more than 5 billion computing hours per year to scientists (counting time on each core separately).
#6: Stampede, Texas Advanced Computing Center at University of Texas
With Dell PowerEdge servers powered by Xeon processors and an InfiniBand interconnect, Stampede scored 5.2 petaflops. It is one of the largest systems in the world devoted to open science research—any researcher at a US institution can submit a request to use some of its computing power.
#7: Juqueen, Jülich Supercomputing Centre in Germany.
Another Blue Gene/Q system, Juqueen’s 458,752 cores hit speeds of 5 petaflops. Using 2,301 kilowatts of power, Juqueen was rated the fifth most energy efficient Top 500 supercomputer last November.
#8: Vulcan, Lawrence Livermore National Laboratory
This 4.3 petaflop system is based on IBM’s Blue Gene/Q supercomputing technology and has 393,216 cores. This supercomputer isn’t devoted solely to government use; Vulcan was recently opened to industry and research universities for collaborative projects.
#9: SuperMUC, Leibniz Supercomputing Centre in Germany
Using IBM iDataPlex servers, 300TB of RAM, and an InfiniBand interconnect, SuperMUC’s 147,456 cores achieved a speed of 2.9 petaflops. Energy costs are cut by directly cooling chips and memory with water at unusually high temperatures of 104 degrees fahrenheit.
#10: Tianhe-1A, National Supercomputing Center in China
Ranked #1 in November 2010, Tianhe-1A uses Intel Xeon CPUs and Nvidia GPUs across its 183,368 processing cores for a rating of 2.6 petaflops.