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| Power Supplies Subcategories |
Computer Power SupplyA computer power supply unit (Computer PSU) is the component that supplies
power to a computer. More specifically, a power supply is typically designed to
convert 100-120 V (North America and Japan) or 220-240 V (Europe, Asia and
Australia) AC power from the power mains to usable low-voltage DC power (DC
power supply) for the internal components of the computer. Some power supplies
have a switch to change between 230 V and 115 V. Other models have automatic
sensors that switch input voltage automatically, or are able to accept any
voltage between those limits. Manufacturers of Computer Power Supplies include:
Apevia,
Axpertec,
Cooler Master,
Coolmax,
Diablo Tek,
OCZ,
PC Power & Cooling,
Ultra, and others.
The most common computer power supplies are built to conform with the ATX
form factor, and
laptop power supplies are also available. The most recent specification of
the ATX standard is version 2.2, released in 2004. This enables different power
supplies to be interchangeable with different components inside the computer.
ATX power supplies also are designed to turn on and off using a signal from the
motherboard, and provide support for modern functions such as the standby mode
available in many computers. Computer power supplies typically come in
different wattage sizes:
less than 300W,
300W,
400W,
500W,
600W,
700W,
800W,
1000W. There are also
SLI Certified PSUs. Laptops are a bit more specialized, and it is important
to make sure that you purchase a
laptop power supply compatible with your notebook computer.
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