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Electricity usage costs have become an increasing fraction of the total cost of ownership (TCO) for data centers. It is possible to dramatically reduce the electrical consumption of typical data centers through appropriate design of the network-critical physical infrastructure and through the design of the IT architecture. For office buildings, ICT typically accounts for more than 20% of the energy used, and in some offices up to 70%. Although energy costs typically comprise less than 10% of an overall IT budget, in a few years they could rise to more than 50% according to a 2006 Gartner report. Integrated planning using current and emerging technologies can however, reduce power consumption in data centers by 50-80% and required floor space by up to 65%.
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