1sockchuck writes "Facebook has now adapted its Open Compute servers to work in leased data center space a step that could make the highly-efficient 'open hardware' designs accessible to a broader range of users. The Open Compute Project was launched last year to bring standards and repeatable designs to IT infrastructure, and has been gaining traction as more hardware vendors join the effort. Facebook's move to open its designs has been a welcome departure from the historic secrecy surrounding data center design and operations. But energy-saving customizations that work in Facebook's data centers present challenges in multi-tenant facilities. To make it work, Facebook hacked a rack and gave up some energy savings by using standard 208V power."