judgecorp writes: Google has elected to open up some of its data center designs, which it has -- until now -- kept to itself. Google has joined the Open Compute Project, which was set up by Facebook to share low-cost, no-frills data center hardware specifications. Google will donate a specification for a rack that it designed for its own data centers. Google's first contribution will be "a new rack specification that includes 48V power distribution and a new form factor to allow OCP racks to fit into our data centers," the company said. "We kicked off the development of 48V rack power distribution in 2010, as we found it was at least 30 percent more energy-efficient and more cost-effective in supporting these higher-performance systems." The company said it hopes to help others "adopt this next generation power architecture, and realize the same power efficiency and cost benefits as Google." Google hasn't submitted a proposed specification to the OCP yet, but the company is working with Facebook to get that done.