How do I choose a power supply?
One feature you’ll run into when choosing a power supply is its efficiency rating. The most common of these are the 80 PLUS certification program, which has been around since 2004.
Should you choose a low-quality power supply?
If you choose a low-quality power supply, you run the risk of damaging your components. On the other hand, if you don’t understand how much power you need in order to efficiently power your system, you could end up allocating more of your budget towards your power supply than is necessary.
How efficient is a power supply?
A really good power supply will convert 90% or more. These rating programs basically tell you how efficient a power supply is at converting AC power into DC power. But, it goes a little deeper than that, as the rating systems judge a power supply’s efficiency when it is under specific loads.
What does EN61000-3-2 require for power supplies above 75W?
The EU standard EN61000-3-2 states that all switched mode power supplies with output power of more than 75W must include a passive PFC converter. Although residential consumers do not have to pay for apparent power, in order to minimize apparent power usage, the higher the power factor the less energy goes wasted back to the mains network.
What is the ideal power factor?
The ideal power factor is 1. This factor is the result of the ratio between effective power and apparent power, falling somewhere between 0 (worst) and 1 (ideal). Thus, the higher the power factor the less energy goes wasted back to the mains network.
What is idle current in power supplies?
Idle current in power supplies refers to the current that flows between a generator and a load without benefiting the load. This has nothing to do with the idle state of your computer.
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