On NPR this morning, there was a delicious little item talking about something that is, canonically, Big Iron. IBM has taken the wraps off of bluefire, their latest supercomputer. After its shakedown period, it's expected to be one of the 25 most powerful supercomputers in the world, capable of 76 teraflops (76 trillion floating-point operations per second).

To get there, it sports the new POWER6 microprocessor, which has a clock speed of 4.7 gigahertz. "So what?" I hear some of you saying, "Supercooled home PC systems have been topping 5GHz for a while now." The difference here is that bluefire consists of 4,064 processors, 12 TB of memory, and 150 TB of disk storage. That's certainly impressive, but not enough by itself to land bluefire here at Big Download's hardware HQ. No, what caught our attention is what sets bluefire apart from other supercompters, including the three (!) it's replacing, is that it's water-cooled. That's right, ladies and gentlemen, one of the open secrets of home-brewed system tweaking has hit the big time. IBM reports that the move to watercooling has allowed them the double bonus (which many of us already enjoy in our home boxes) of being able to run faster processors, while at the same time, saving energy to keep it running at a stable temperature. IBM says that bluefire uses 33% less energy per rack than the equipment it's going to replace.

"We're especially pleased that bluefire provides dramatically increased performance with much greater energy efficiency." -- Tom Bettge, director of operations and services for the National Center for Atmospheric Research; Computational and Information Systems Laboratory.