#2 Sequoia

Site: Lawrence Livermore National Laboratory, United States

Manufacturer: IBM

Country: United States

Architecture: BlueGene/Q

Processor: Power BQC 16C 1.60 GHz

Cores: 1572864

Power: 7890.00 kW

Memory: 1572864 GB

Operating system: Linux

Speed: 16.32 petaflops per second

Date Created: 2011

The supercomputer is manufactured by IBM for the National Nuclear Security Administration as part of the Advanced Simulation and Computing Program (ASC). It was delivered to the Lawrence Livermore National Laboratory (LLNL) in 2011 and was fully deployed in June 2012.

Sequoia will be used primarily for nuclear weapons simulation, and also plays important role for scientific purposes such as astronomy, energy, study of the human genome, and climate change.

#1 Titan

Site: Oak Ridge National Laboratory

Manufacturer: Cray Inc

Country: United States

Architecture: Cray XK7

Processor: Opteron 6274 16C 2.200GHz+ NVIDIA K20x

Cores: 560640

Power: 8209.00 kW

Memory: 710144 GB

Interconnect: Cray Gemini interconnect

Operating system: Cray Linux Environment

Speed: 17.59 petaflops 

Date Created: 2012

Titan is developed by Cray Inc at Oak Ridge National Laboratory for the purpose of science projects. Titan is an upgrade of Jaguar, with addition NVIDIA K20x GPU to its CPU, gained more computational power. It was announced in October 2011 and became operational in October 2012. Titan will use its extraordinary computing power for study alternative and efficient energy, efficient engines, climate change, and identifying new materials.