Workers put the final touches on the Titan supercomputer at Oak Ridge National Lab. Titan takes up the same amount of physical space as its predecessor, Jaguar, but it's 10-times more powerful. It's also five times more energy efficient. Titan is capable of churning through more than 20 petaflops of calculations each second, verus 2.3 petaflops with Jaguar. And it consumes about 9 megawatts of power versus 7 megawatts for the older system. If Oak Ridge upgraded Jaguar by simply expanding its CPU-based architecture, the system would be more than four times its current size and consume more than 30 megawatts of power.