November 2015

For the sixth consecutive time, Tianhe-2, a supercomputer developed by China’s National University of Defense Technology, has retained its position as the world’s No. 1 system, according to the 46th edition of the twice-yearly TOP500 list of the world’s most powerful supercomputers. Overall, change at the top of the list is again minor, with only two new systems in the Top 10 -- the Trinity supercomputer built by Cray and jointly deployed by the Department of Energy’s (DOE) Los Alamos and Sandia national laboratories, and the Hazel-Hen system built by Cray and installed at the HLRS - Höchstleistungsrechenzentrum Stuttgart in Germany.

In the bigger picture, China nearly tripled the number of systems on the latest list, while the number of systems in the United States has fallen to the lowest point since the TOP500 list was created in 1993. China is also carving out a bigger share as a manufacturer of high performance computers with multiple Chinese manufacturers becoming more active in this field.

Tianhe-2, which means Milky Way-2, led the list with a performance of 33.86 petaflop/s (quadrillions of calculations per second or Pflop/s) on the Linpack benchmark. Keeping its hold on the No. 2 spot is  Titan, a Cray XK7 system installed at DOE’s Oak Ridge National Laboratory. Titan, the top system in the United States and one of the most energy-efficient systems on the list, achieved 17.59 petaflop/s on the Linpack benchmark.

The only new entries in the Top 10 supercomputers on the latest list are Trinity at No. 6 and Hazel-Hen at No. 8. Trinity is a Cray XC system  which has 301,056 cores and achieved 8.1 Pflops/s. Trinity is managed and operated by Los Alamos National Laboratory and Sandia National Laboratories under the Alliance for Computing at Extreme Scale (ACES) partnership. Hazel-Hen is also a Cray XC system installed in Germany at the HLRS - Höchstleistungsrechenzentrum Stuttgart -- and features 185,088 cores and achieved 5.6 Pflop/s. 

Six of the Top 10 systems were installed in 2011 or 2012, Tianhe-2 in 2013 and only Trinity, Hazel-Hen, and Shaheen II in Saudi Arabia were installed in 2015. This low level of turnover among the top supercomputers reflects a slowing trend that began in 2008.


- 17/11/2015: Various performance updates 

TOP 10 Sites for November 2015

For more information about the sites and systems in the list, click on the links or view the complete list.

Rank System Cores Rmax (TFlop/s) Rpeak (TFlop/s) Power (kW)
1 Tianhe-2 (MilkyWay-2) - TH-IVB-FEP Cluster, Intel Xeon E5-2692 12C 2.200GHz, TH Express-2, Intel Xeon Phi 31S1P , NUDT
National Super Computer Center in Guangzhou
3,120,000 33,862.7 54,902.4 17,808
2 Titan - Cray XK7 , Opteron 6274 16C 2.200GHz, Cray Gemini interconnect, NVIDIA K20x , Cray Inc.
DOE/SC/Oak Ridge National Laboratory
United States
560,640 17,590.0 27,112.5 8,209
3 Sequoia - BlueGene/Q, Power BQC 16C 1.60 GHz, Custom , IBM
United States
1,572,864 17,173.2 20,132.7 7,890
4 K computer, SPARC64 VIIIfx 2.0GHz, Tofu interconnect , Fujitsu
RIKEN Advanced Institute for Computational Science (AICS)
705,024 10,510.0 11,280.4 12,660
5 Mira - BlueGene/Q, Power BQC 16C 1.60GHz, Custom , IBM
DOE/SC/Argonne National Laboratory
United States
786,432 8,586.6 10,066.3 3,945
6 Trinity - Cray XC40, Xeon E5-2698v3 16C 2.3GHz, Aries interconnect , Cray Inc.
United States
301,056 8,100.9 11,078.9 4,233
7 Piz Daint - Cray XC30, Xeon E5-2670 8C 2.600GHz, Aries interconnect , NVIDIA K20x , Cray Inc.
Swiss National Supercomputing Centre (CSCS)
115,984 6,271.0 7,788.9 1,754
8 Hazel Hen - Cray XC40, Xeon E5-2680v3 12C 2.5GHz, Aries interconnect , Cray Inc.
HLRS - Höchstleistungsrechenzentrum Stuttgart
185,088 5,640.2 7,403.5 3,615
9 Shaheen II - Cray XC40, Xeon E5-2698v3 16C 2.3GHz, Aries interconnect , Cray Inc.
King Abdullah University of Science and Technology
Saudi Arabia
196,608 5,537.0 7,235.2 2,834
10 Stampede - PowerEdge C8220, Xeon E5-2680 8C 2.700GHz, Infiniband FDR, Intel Xeon Phi SE10P , Dell
Texas Advanced Computing Center/Univ. of Texas
United States
462,462 5,168.1 8,520.1 4,510