In today's article, we will talk about how the choice of power supply for a computer should be made . But first, we point out one important point, which is often overlooked when assembling a computer system. It is especially sad that it is the beginners who are faced with its consequences.
It's simple: in the computer, any component device is the key. You are mistaken with the choice of a mouse - you will soon have to buy a new one with a higher DPI value, other dimensions, additional buttons; save on the keyboard - typing speed will drop, its body will bend, the buttons will spontaneously be pressed. Not having studied how the choice of a power supply is made, it is possible to obtain unstable operation of the entire system due to voltage mismatch. Even the case, which to many seems to be just a metal box that holds all the components, requires thoughtful selection. Sometimes it is surprising: for several days people decide which tulle is needed for a window, but at best, they trust a stranger to an unfamiliar consultant in a computer store. You need to understand at least the basics.
The choice of power supply begins with the calculation of the value of power consumed by computer components. There are two ways to determine it. First: make a list of all internal components (board, processor, video card, hard drive, memory modules). External powered separately (printer, scanner, monitor) are not taken into account. After that, go to the manufacturers' websites, indicate your models and find the power consumption in the specifications.
For example, to find out the data on the Radeon 5570, you should open the AMD website, go through the search to the specifications, find out the power value. Then it remains only to summarize the values.
The choice of power supply is carried out taking into account that the amount received is less than at least 30-40% of the declared for the unit itself. For example, if the system unit consumes 200 watts, then a 300-watt power supply is suitable for it. For the average modern system, the “honest” 450 W is enough (taking into account a small prospect).
The second method of calculation is more convenient. To do this, you need to type in the browser line "calculation of the power supply online" or download the appropriate program - the result is the same. Next, you need to specify the model of components (they are on the boxes, if anyone does not know) and their number. As a result, the desired power will be displayed. Comfortable enough.
We recommend that you overpay, but purchase a quality power supply unit (Cooler Master, FSP, Thermaltake, Zalman), and not a Chinese counterpart. The problem is that the power indicated on low-cost models is almost always overstated. Thus, if you really want to save, you should purchase a simple power source, but with a good margin. Please note that a good block is quite heavy.
Fans of silence should take a closer look at models that can reduce the speed of the cooling fan and completely stop it. Also a good option is to buy a device with passive cooling.
Installing the power supply is very simple. All connectors have special “keys” that prevent erroneous connections. The main thing is attentiveness and unhurriedness.