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  2. Power supply unit (computer) - Wikipedia

    en.wikipedia.org/wiki/Power_supply_unit_(computer)

    The first IBM PC power supply unit (PSU) supplied two main voltages: +5 V and +12 V. It supplied two other voltages, −5 V and −12 V, but with limited amounts of power. Most microchips of the time operated on 5 V power. Of the 63.5 W these PSUs could deliver, most of it was on this +5 V rail.

  3. 80 Plus - Wikipedia

    en.wikipedia.org/wiki/80_Plus

    Logo 80 Plus Bronze certified FlexATX PSU. 80 Plus (trademarked 80 PLUS) is a voluntary certification program launched in 2004, intended to promote efficient energy use in computer power supply units (PSUs).

  4. Gaming computer - Wikipedia

    en.wikipedia.org/wiki/Gaming_computer

    A gaming computer, also known as a gaming PC, is a specialized personal computer designed for playing PC games at high standards. They typically differ from mainstream personal computers by using high-performance graphics cards , a high core-count CPU with higher raw performance and higher-performance RAM .

  5. Public Sector Undertakings in India - Wikipedia

    en.wikipedia.org/wiki/Public_Sector_Undertakings...

    Public Sector Undertakings (PSU) in India are government-owned entities in which at least 51% of stake is under the ownership of the Government of India or state governments.These type of firms can also be a joint venture of multiple PSUs. These entities perform commercial functions on behalf of the government.