So far, though, IBM says the technology has gained more traction in the university and high-performance computing worlds.

“It turns out the majority of customer interest is coming from the high-performance computing space,” says Herb Schultz, IBM's deep-computing marketing manager.

Out of several hundred customers, about 75% bought the iDataPlex for high-performance computing, rather than to build Web 2.0 sites, Schultz says. While IBM did not predict that would be the case, Schultz says “it makes perfect sense. The product really does comport with their need to find a low-cost, high-performance technology.”

The iDataPlex fits up to 84 servers with a design that pushes two racks together, allowing them to share power whips and cables. IBM focused on lowering power use by rotating the servers horizontally 90 degrees, letting fans run at a lower velocity, and by adding an optional rear-door heat exchanger that extracts heat from the system.

Sharing power cables reduces the system’s fault-tolerance, but the Web 2.0 companies the iDataPlex is designed for have built their systems to quickly fail over from one server to another. In their case, the sacrifice is worth it in order to gain power and cost efficiencies, IBM said when it introduced the system.