The U.S. Environmental Protection Agency (EPA) developed new Energy Star® program requirements (Version 1.0) for enterprise-class computer servers, which took effect on May 15, 2009. This document from NEI defines what constitutes an Energy Star qualified computer/server (i.e., a computer that provides services and manages networked resources for client devices). It contains Tier 1 and Tier 2 compliance specifications focused on power supply efficiencies over given workloads, as well as during idle conditions. Subsequent versions of the document are expected to provide IT buyers with a useful method for comparing the energy efficiency of servers from compliant vendors.

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