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2. Power supply unit (computer) - Wikipedia

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

   A power supply unit (PSU) ... A 'power supply tester' is a tool used to test the functionality of a computer's power supply. Testers can confirm the presence of the ...

3. Power good signal - Wikipedia

   en.wikipedia.org/wiki/Power_good_signal

   The ATX specification defines the Power-Good signal as a +5-volt (V) signal generated in the power supply when it has passed its internal self-tests and the outputs have stabilized. This normally takes between 0.1 and 0.5 seconds after the power supply is switched on.

4. Load regulation - Wikipedia

   en.wikipedia.org/wiki/Load_regulation

   Load regulation is the capability to maintain a constant voltage (or current) level on the output channel of a power supply despite changes in the supply's load (such as a change in resistance value connected across the supply output).

5. Why is my computer so slow? - AOL

   www.aol.com/products/blog/why-is-my-computer-so-slow

   Faulty Hardware Components: Any malfunctioning hardware component, such as a faulty motherboard, power supply unit (PSU) or peripheral device (e.g., mouse, keyboard), can cause slow performance or ...

6. 80 Plus - Wikipedia

   en.wikipedia.org/wiki/80_Plus

   A heavily loaded power supply and the computer it is powering generate significant amounts of heat, which may raise the power supply temperature, which is likely to decrease its efficiency. Since power supplies are certified at room temperature, this effect is not taken into account. [5] [15] 80 Plus does not set efficiency targets for very low ...

7. PS-ON Signal - Wikipedia

   en.wikipedia.org/wiki/PS-ON_Signal

   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). Conversely the power supply is turned off when the PS-ON is in open-circuit. [1] [2] The PS_ON pin can be jumpered to manually turn a PSU on. [3]

8. Built-in self-test - Wikipedia

   en.wikipedia.org/wiki/Built-in_self-test

   Typical tests are for temperature, humidity, bad communications, burglars, or a bad power supply. For example, power systems or batteries are often under stress, and can easily overheat or fail. So, they are often tested. Often the communication test is a critical item in a remote system.

9. 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.