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  2. Power supply unit (computer) - Wikipedia

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

    Entry-Level Power Supply Specification (EPS) is a power supply unit meant for high-power-consumption computers and entry-level servers. Developed by the Server System Infrastructure (SSI) forum, a group of companies including Intel, Dell, Hewlett-Packard and others, that works on server standards, the EPS form factor is a derivative of the ATX ...

  3. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. [ 1 ] POST processes may set the initial state of the device from firmware and detect if any hardware components are non-functional.

  4. Microsoft Product Activation - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Product_Activation

    In Windows 7 and later, significant hardware changes (e.g. motherboard) may require a re-activation. In Windows 10 and 11, a user can run the Activation Troubleshooter if the user has changed hardware on their device recently. If the hardware has changed again after activation, they must wait 30 days before running the troubleshooter again.

  5. Product activation - Wikipedia

    en.wikipedia.org/wiki/Product_activation

    Product activation is a license validation procedure required by some proprietary software programs. Product activation prevents unlimited free use of copied or replicated software. Unactivated software refuses to fully function until it determines whether it is authorized to fully function. Activation allows the software to stop blocking its use.

  6. 80 Plus - Wikipedia

    en.wikipedia.org/wiki/80_Plus

    When a company resells an OEM power supply under a new name, it must be certified under the new name and company, even if the OEM supply is certified. In some instances, a reseller has claimed a higher wattage than the supply can deliver, so the reseller's supply would not meet 80 Plus requirements.

  7. Power good signal - Wikipedia

    en.wikipedia.org/wiki/Power_good_signal

    The ATX specification requires that the power-good signal ("PWR_OK") go high no sooner than 100 ms after the power rails have stabilized, and remain high for 16 ms after loss of AC power, and fall (to less than 0.4 V) at least 1 ms before the power rails fall out of specification (to 95% of their nominal value).

  8. PS-ON Signal - Wikipedia

    en.wikipedia.org/wiki/PS-ON_Signal

    #PS_ON pin is marked by number 16. PS-ON Signal is a pin on a 20-pin or 24-pin ATX-specified power connector used to turn a personal computer power supply unit on/off. The PS_ON pin is normally pulled high in an open-circuit, but will turn on the power supply when it is pulled low, by shorting it to the common signal (COM).

  9. Power supply - Wikipedia

    en.wikipedia.org/wiki/Power_supply

    A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are ...