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FAQ on the choice of components for the PC

The choice of components for the PC пїЅ | FAQ

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Post has been editedGloomy - 13.01.12, 12:48

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Characteristics of Uninterruptible Power Supply (UPS)

• Output power measured in volt-amperes (VA) or watts (W);
  
• Switching time, that is, the time for the UPS to transfer to battery power (measured in milliseconds, ms);
  
• The battery life is determined by the battery capacity and the power of the equipment connected to the UPS (UPS) (measured in minutes, min.);
  
• The width of the input (mains) voltage range at which the UPS (UPS) is able to stabilize the power without switching to batteries (measured in volts, V);
  
• Battery life (measured in years, usually around 5 years).
  

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Battery life

For most ordinary office UPSs of small capacity, the battery life at maximum load is 4-15 minutes.
If the UPS load (UPS) is less than the maximum, the battery life increases. Due to the nonlinearity of the discharge curve of the battery, this increase is not proportional to the decrease in load. If the load is halved, the work time may increase by 2.5в€’5 times, if three times, then the time increases by 4в€’9 times, etc.
High power UPS (UPS) and some low power UPS (UPS) have the ability to increase battery life by replacing the battery with a larger battery or installing an additional battery. A larger battery may be installed in the same case or an additional battery case may be installed.

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Power factor. How to choose an uninterruptible power supply (UPS)?

To calculate the required power of the UPS, it is necessary to sum up the power of all consumers and add 20 ... 25% to this amount. If the power of the UPS is measured in VA, and the load power in W, then the load power should be divided by the power factor of 0.6 ... 0.7 (in order to convert W to VA). The result of these calculations will be the required power of the UPS. The total power of the computer is not difficult to calculate, you just need to add power to the monitor to the power supply unit (since it supplies the entire system unit), and such details as the keyboard and mouse consume very little current, so you should not pay attention to them.
Advice: it is better to choose a UPS with a power of 20 ... 25% more than the capacity of the redundant equipment. Thus, over time, with an increase in load power, there will be no need to replace the UPS.

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How to assemble a computer

There are three reasons that will make you think about the opinion of independently assembling a computer, rather than buying it collected:

• You will be able to create a machine that will exactly meet your needs.
  
• It will be easier for you to upgrade your computer in the future when you fully understand the system.
  
• You can save money.
  

The first step in building a computer is to decide which machine you want to build. Do you need an expensive computer for a child? Small, quiet computer to use as a multimedia device? Gaming computer? Or do you need a powerful machine with a large amount of disk space for video editing? The possibilities are endless, and only the configuration of the future computer depends on your decisions. Thus, you should know from the very beginning why you need a computer.

The most important part of any computer is the motherboard.
Once you have chosen your motherboard, you are ready to choose the rest. Now you need to:

• The processor that will fit your motherboard.
  
• RAM with the appropriate connection for your motherboard. If your motherboard uses special memory configurations (as a rule, to improve performance), make sure that you choose the right RAM.
  
• If the power supply unit does not include the power supply unit, you need to select it. Make sure the power supply connectors match the board. Three hundred watts is enough for most machines, but if you build a gaming computer with multiple video cards or a computer with additional internal hardware, you can consider something more powerful.
  
• Choose the appropriate video card if you are not using the built-in video card on the motherboard. Make sure the card connector is suitable for the motherboard (AGP or PCI Express).
  

Post has been editedGloomy - 13.01.12, 12:43