A typical power supply looks like a metal box with wire harnesses sprouting from one side. Should you need to verify your PSUs brand and model to look up its specs or seek tech support, youll need to read its label. This probably will require you to open your PCs case. Power supplies are marketed primarily by wattage ratings. This is both a blessing and a curse. Its a blessing because in general, a novice can pretty much assume that a current-generation PSU with number of watts and the right connectors will handle his computers needs, and more often than not, hell be right. Theres no real penalty (and even some power-saving benefits to be had) from purchasing a power supply with too much wattage, save a higher price. On the other hand, manufacturers dont all report their products wattage the same way, and there are many caveats and electrical formulae behind that deceptively simple number. Performance enthusiasts and gamers in particular should look deeper into a PSUs specs, especially the temperature (such as 50 degrees Celsius, or 122 degrees Fahrenheit) at which the manufacturer logged those specs. If the rated temperature is lower than the typical temp inside a running computer, such as 25 C, the PSU will be less efficient and provide less power during normal use. The hotter the temperatures, the weaker a power supply will be due to increased resistance. Also, the number of amperes on each
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Computer Power Supplies
Computer power supplies convert alternating current (AC) line to direct current (DC) line, needed by the computer.
Uninterruptible Power Supplies (UPS)
Uninterruptible power supplies (UPS) are backup batteries that provide emergency power to electrical systems in case power becomes unavailable. They are connected between a power source (such as an electrical outlet) and the equipment to protect (such as a motor or computer).
Single Phase Uninterruptible Power Supplies (UPS)
Single phase uninterruptible power supplies (UPS) sit between an AC outlet and an electronic device to provide power conditioning, back-up protection, and distribution for electronic equipment loads. They also prevent power disturbances from affecting the performance and life of the electronic device and vital data.
High Voltage Power Supplies
High voltage power supplies use linear technology to provide one or more DC outputs at voltage levels of hundreds or thousands of volts.
DC motors are most commonly used in variable speed and torque applications. They include brushless and gear motors, as well as servomotors.
Topics of Interest
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Some power supplies have switches that let you cut power to your system. Make sure you havent turned off your power supply. See if your computers power supply has an on/off switch that...
October 2005 Vol.9 Issue 6 Add To My Personal Library Problem: When I press the power button on my computer, the power LED (light-emitting diode) lights up, but otherwise, the PC does not turn...
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