Summit (supercomputer)

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Sponsors U.S. Department of Energy
Operators IBM
Architecture 9216 POWER9 22-core CPUs
27,648 Nvidia Tesla V100 GPUs[1]
Power 15 MW
Storage 250 PB
Purpose Scientific research
Web site

Summit or OLCF-4 is a supercomputer developed by IBM for use at Oak Ridge National Laboratory, which as of June 8, 2018 is the fastest supercomputer in the world.[2][3][4][5][6] Its processing power is clocked at 200 petaflops.[6]


Each node has over 500GB of coherent memory (high-bandwidth memory plus DDR4 SDRAM) which is addressable by all CPUs and GPUs plus 800GB of non-volatile RAM that can be used as a burst buffer or as extended memory.[7] The POWER9 CPUs and Volta GPUs are connected using NVIDIA's high speed NVLink. This allows for a heterogeneous computing model.[8] To provide a high rate of data throughput, the nodes will be connected in a non-blocking fat-tree topology using a dual-rail Mellanox EDR InfiniBand interconnect for both storage and inter-process communications traffic which delivers both 200Gb/s bandwidth between nodes and in-network computing acceleration for communications frameworks such as MPI and SHMEM/PGAS.

See also


  1. ^ "ORNL Launches Summit Supercomputer". 
  2. ^ Alcorn, Paul (20 November 2017). "Regaining America's Supercomputing Supremacy With The Summit Supercomputer". Tom's Hardware. Retrieved 20 November 2017. 
  3. ^ R. Johnson, Colin (15 April 2015). "IBM vs. Intel in Supercomputer Bout". EE Times. Retrieved 29 December 2015. 
  4. ^ Shankland, Steven (14 September 2015). "IBM, Nvidia land $325M supercomputer deal". C|Net. Retrieved 29 December 2015. 
  5. ^ Noyes, Katherine (16 March 2015). "IBM, Nvidia rev HPC engines in next-gen supercomputer push". PC World. Retrieved 29 December 2015. 
  6. ^ a b Lohr, Steve (8 June 2018). "You'd Need 63 Billion Years to Do What This Supercomputer Can Do in a Second". New York Times. Retrieved 8 June 2018. 
  7. ^ Lilly, Paul (January 25, 2017). "NVIDIA 12nm FinFET Volta GPU Architecture Reportedly Replacing Pascal In 2017". HotHardware. 
  8. ^ "Summit and Sierra Supercomputers: An Inside Look at the U.S. Department of Energy's New Pre-Exascale Systems" (PDF). November 1, 2014. 
Preceded by
Sunway TaihuLight
93.01 petaflops
World's most powerful supercomputer
June 2018 –
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