How to choose the power supply

Power supply – Energy conversion device for specified values. To begin with, we will analyze after the criteria have been chosen for the computer.

The correct choice of power supply – the maximum power required for the components of the computer, which is measured in power units, called Watt (W).

10-15 years ago for the normal operation of the computer, 200 watts were sufficient and today this value has increased, due to the appearance of new components, which consume large quantities of energy.

For example, the Sapphire HD 6990 video card can consume up to 450 Vatt. In other words, to choose nutrition you must know what the component energy consumption is.

Shows an example, how to choose power (ATX):

• Processor – 130 W
• Motherboard – 40 W
• RAM – 10 W, 2 BUC
• HDD – 40 W, 2 BUC
• Video – 300 W
• CD-ROM, CD-RW, DVD-20 W
• Cooling fans – 2 W, 5 pieces

We have a list of components and their power requirements, to calculate the power of the power supply we must collect the power of all components and+20% for the reserve, that is 130+40+(20)+(80)+300+20+(10) = 600. Therefore, the total energy of the components is 600 watt+20% (120 W) = 720 watts, which is not recommended for this computer. 720 Watt.

Ok! The power of energy that we have analyzed, now let’s move on to quality: because it does not mean quality. Today on the market there are a large number of food sources, from «no name» cheap to famous brands. A good power source can be found among the cheap: good quality can be found everywhere and how to find out without opening the box, it is a difficult question.

However, I will give some suggestions to choose the correct feeding source: quality feeding weighs more than 1 kg. Pay attention to the sign of wiring (as in the image), if written 18 AWG – it is the norm, if 16 AWG – it is very good, if 20 AWG – are cables of poor quality.

If you don’t want to risk, choose the feeding of known companies. Below: the list of recognized brands:

• Zalman
• Theme
• Corsair
• Hyper
• FSP
• Delta Power

There is another criterion: the size of the nutrition, which depends on the housing, in which it will be mounted. Usually all power sources have atx standard (as in the photo), but there are sources that do not have this standard.

Conclusion

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