Ask the sales assistant store any computer equipment lead the list of the most important components of the system unit of a personal computer.Will Set the CPU, graphics card, motherboard and some other parts, listed their features.And only a few "remember" how to choose a power supply for the system.The power supply in the best case mentioned at the very end, and sometimes do not talk about it.
This is a gross error.You can carefully collect information on the forums about the ingredients, look for the optimum by criterion "price / performance" solution.In the end, to get the coveted system ... and get constant hovering and other malfunctions of the fact that the payment was not made power supply.Everyone knows that if a sports car pour poor-quality fuel, it will be impossible to win, despite the most advanced of its components.But in computer technology are the principle "and so come down."Alas, do not come.
calculation power the computer power supply is now necessary to carry out a mandatory basis.Regardless of whether you are replacing an old unit with a new or additional components are connected.In fact, the power supply calculation is simple and the strength to carry out even without special knowledge in electrical engineering.
First of all, you need to make a list of installed components.For example, it may look as follows:
- RAM.Two DDR3 module.
- The CPU Intel Core i3 2120 in normal mode.
- one with the Radeon 5570 DDR5 memory.
The calculation of the power supply, it is necessary to consider that in the system unit only has a few major electricity consumers, which account for 90% of total capacity.This processor and graphics card.Different printers, scanners, flash drives, fans, mouse and keyboard to consume no more than 10-15%.Therefore, the calculation power supply is carried out primarily for high-end components, and get the results added 30% and acquired the necessary power unit.
So, the list compiled.Check the power consumption can be up to specification.To do this, follow the manufacturer's website and search for the desired data.Similarly, we proceed to determine the capacity of the video card.For example, in the processing power of 65 watts, and video - 43 watts.Moreover, the maximum values obtained when running under full load.The average computer is in this mode does not work for more than 30% of the time during the whole period of its use.
Summing values, we get 108 watts.Throw with a margin of 90 watts on the hard drives, cooling fans, the motherboard and peripherals.Get 200 watts.The next model - 250 watts.Now, take into account two important points:
- All manufacturers PSUs indicate either intentionally inflated values, or peak, where continuous operation is not possible.Especially noting the inflated production of Chinese companies.Conclusion: The figures you need to add 50-150 watts (the more powerful components, the more we take stock).Actually, these are the most 30% as at the beginning of the article.
- Power supplies give a range of voltages (12, 5, 3) and the declared capacity is total.In modern computer systems, the main burden falls on the line 12 V. Conclusion: choose the power supply in which power to the maximum of 12 (more than the other models).
recommended to purchase quality blocks known manufacturers (CoolerMaster, Zalman, etc.).Although their value exceeds the price of "powerful" of the Chinese instrument, the quality of performance and stability of the stress obviously higher.
calculating the power supply, you can use special online calculator, which many in the global network.To find the value of power, enough to enter the type and number of components.The disadvantage of this approach - in a large spread of results (the creators of such programs "reinsured").
