The EPA's Report to Congress on Server and Data Center Energy Efficiency Public Law 109-431 is over a year old, but remains an important data source. Among its tipping point statistics: "Another impact of higher energy densities is that server hardware is no longer the primary cost component of a data center . . . the purchase price of a new (1U) server has been exceeded by the capital cost of power and cooling infrastructure to support that server and will soon be exceeded by the lifetime energy costs alone for that server . . . This represents a significant shift in data center economics that threatens to overwhelm the advances in chip efficiency that have driven the growth of digital information during the past 30 years."