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Ac vs dc8/29/2023 Increased efficiency would mean less power consumption and less heat output, meaning less cooling is required. Consolidating all the power conversion into one central large AC-to-DC converter cuts down on heat loss and increases efficiency. The reason DC power is being considered outside the telecom sphere is that each one of the small AC-to-DC converters in the various pieces of equipment generates heat as energy is lost during the conversion. Only a small subset of telecommunications equipment is routinely deployed with DC power. The AC power is delivered to the data center, distributed to the racks and then converted to DC inside individual servers. The vast majority of equipment in the data center today uses AC power at 110V or 240V. Fifteen percent of participants in Nemertes Research benchmark study on Data Centers are evaluating DC power. The fight continues today, as the costs to power and cool data centers climb to become the predominant costs of running a data center. Tesla and Edison fought over the question of whether alternating current (AC) or direct current (DC) is best for transmitting power.
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