The US Government has just put in an order for a new supercomputer from IBM, dubbed the Sequoia. What makes the Sequoia so special? Well, for starters it's about 20 times faster than the world's current fastest supercomputer. Yeah, it's pretty damned fast.
It's a 20 petaflop computer, and it's due in 2012. It'll use a total of 1.6 million cores assisted by 1.6 petabytes of memory to run calculations, most of which will simulate nuclear explosions. Also, I'm pretty sure it can run Crysis. Awesome.