This petascale supercomputer built by IBM was deployed at the Lawrence Livermore National Laboratory in 2012. It quickly replaced the K Computer as the world’s fastest, benchmarking 16 petaflops. Running entirely on Linux, it shattered records for highest sustained performance at 10 petaflops. For the first time, a model of the electrophysiology of the human heart was able to run at near realtime simulation. It was based on the Blue Gene/Q design and sported over a million processor cores and a staggering 1 PB of memory. In January 2013 it became the first supercomputer to use more than one million computing cores for a single application. It was later dropped to number three on the Top500 supercomputer list, replaced by the Tinhae-2 and Titan.