A computer's power supply converts the 110-volt AC power from the power company into stable DC voltages (e.g. 12V, 5V, and 3.3V) that the computer can use. This process wastes power and generates heat. Increasing the conversion efficiency not only reduces the amount of power lost in conversion, but also reduces the amount of heat generated, and thus the amount of energy expended on cooling.
由於電源供應器是將電力公司發出的 110V 交流電轉換成穩定的直流電壓（如 12V、5V、3.3V），而轉換過程會產生廢熱等損耗；若能提高轉換效率，不但減少損耗，也不用再耗費大量電力去處理散熱難題。