The Mira supercomputer processes quadrillions of operations every second. It is powered by 768,000 cores spread across 48 blade racks. It is powerful enough to simulate the entire universe.
But can it run Crysis?
The Mira supercomputer has been built in order to track millions of particles as they move throughout space and collide with one another. Essentially the goal of this project is to try and create simulated galaxies in order to confirm how they are created and how they evolve. It's been built in an attempt to provide more insight into multiple different theories scientists have concocted in an attempt to explain how our cosmos was created and how it continues to exist.
It's crazily interesting stuff, and somewhat beyond my casual understanding of popular science, but Mira is pretty much the most powerful computer ever made at this point -- it can perform quadrillion floating point operations per second and has nearly a petabyte of RAM.
For more in-depth info head to The Atlantic.